All c# extension methods

Gets the description attribute assigned to an item in an Enum.

C# System.Enum Chirdeep Tomar

Orders a list based on a sortexpression. Useful in object databinding scenarios where the objectdatasource generates a dynamic sortexpression (example: "Name desc") that specifies the property of the object sort on.

C# System.Collections.Generic.IEnumerable<T> C.F.Meijers

Async create of a System.Collections.Generic.List<T> from an System.Collections.Generic.IQueryable<T>.

C# System.Collections.Generic.IQueryable<T> Fons Sonnemans

Export DataReader to CSV (List<String>). Basic example that to export data to csv from a datareader. Handle value if it contains the separator and/or double quotes but can be easily be expended to include culture (date, etc...) , max errors, and more.

C# System.Collections.Generic.List<string> Thierry Fierens

String extensions, download CoreSystem Library from codeplex; http://coresystem.codeplex.com

C# System.String Faraz Masood Khan

Groups the elements of a sequence according to a specified firstKey selector function and rotates the unique values from the secondKey selector function into multiple values in the output, and performs aggregations.

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Converts an IEnumerable<IGrouping<TKey,TValue>> to a Dictionary<TKey,List<TValue>> so that you can easily convert the results of a GroupBy clause to a Dictionary of Groupings. The out-of-the-box ToDictionary() LINQ extension methods require a key and element extractor which are largely redundant when being applied to an enumeration of groupings, so this is a short-cut.

C# System.Collections.Generic.IGrouping James Michael Hare (BlackRabbitCoder)

Formats a string with the specified mask

C# System.String Vincent van Proosdij

When building a LINQ query, you may need to involve optional filtering criteria. Avoids if statements when building predicates & lambdas for a query. Useful when you don't know at compile time whether a filter should apply. Borrowed from Andrew Robinson. http://bit.ly/1V36G9

C# System.Collections.Generic.IEnumerable<T> Phil Campbell

I have created this AddRange<T>() method on ObservableCollection<T> because the LINQ Concat() method didn't trigger the CollectionChanged event. This method does.

C# System.Collections.ObjectModel.ObservableCollection<T> Fons Sonnemans

Encrypt and decrypt a string using the RSACryptoServiceProvider.

C# System.String Mark de Rover

Paging extension method for NHibernate 3.0 and its new query API QueryOver.

C# Nhibernate.QueryOver Alexander Tank

Shortcut for foreach and create new list

C# System.Collections.Generic.IEnumerable<T> Pedram Jabbari

Convert a IEnumerable<T> to a ObservableCollection<T> and can be used in XAML (Silverlight and WPF) projects

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Parses the specified string value into the Enum type passed. Also contains a bool to determine whether or not the case should be ignored.

C# System.Enum Dan Atkinson

The System.Windows.Forms.BindingSource has a property to return the current row as DataRowView object. But most of the time we need this as DataRow to manipulate the data. This extension method checks the Current property of BindingSource for nullity, returns null if it is null and returns the current Row as DataRow object if the Current property is not null.

C# System.Windows.Forms.BindingSource V J Reddy

Emulation of PHPs ucfirst()

C# String Stuart Sillitoe

Converts an IEnumerable to DataTable (supports nullable types) adapted from http://www.c-sharpcorner.com/UploadFile/VIMAL.LAKHERA/LINQResultsetToDatatable06242008042629AM/LINQResultsetToDatatable.aspx

C# System.Collections.Generic.IEnumerable<T> Ewerton Luis de Mattos

An extension method that produce a excel file of List<T>. This would be useful if you want to automatically generate a Excel out of any other primative data type collection I provided 1 overloads of this method, that accepts a Path as string to save excel file to location on disk.

C# System.Collections.Generic.IList<T> Saurabh dubey

http://devlicio.us/blogs/joe_niland/archive/2006/10/10/Generic-Enum-to-List_3C00_T_3E00_-converter.aspx

C# System.Enum Joe Niland

Export datatable to CSV file

C# System.Data John

Checks if a string value is numeric according to you system culture.

C# System.String Faisal Iqbal

Makes a copy from the object.

C# System.Object Carlos Alessandro Ribeiro

Convert an object to JSON an back

C# System.Object Unknown

OrderBy() is nice when you want a consistent & predictable ordering. This method is NOT THAT! Randomize() - Use this extension method when you want a different or random order every time! Useful when ordering a list of things for display to give each a fair chance of landing at the top or bottom on each hit. {customers, support techs, or even use as a randomizer for your lottery ;) }

C# System.Collections.Generic.IEnumerable<T> Phil Campbell

Properly invokes an action if it is required. Best way to handle events and threaded operations on a form.

C# System.Control David Harris

Shortcut for foreach

C# System.Collections.Generic.IEnumerable<T> Jeroen de Zeeuw, Rob van Lanen

Converts a string into a "SecureString"

C# System.String Jonnidip

if the object this method is called on is not null, runs the given function and returns the value. if the object is null, returns default(TResult).

C# System.Object dave thieben

Computes the hash of a string using one of the following algorithms: HMAC, HMACMD5, HMACSHA1, HMACSHA256, HMACSHA384, HMACSHA512,MACTripleDES, MD5, RIPEMD160, SHA1, SHA256, SHA384, SHA512.

C# System.String Cosmin Pirlitu

It returns false if given collection is null or empty otherwise it returns true.

C# System.Collections.Generic.IEnumerable<T> Omkar Panhalkar

Removes any HTML or XML tags from a string. Super simple, but I didn't see anything here like it. I've created similar methods in the past to take into account things like <script> blocks, but I'm not worrying about that here.

C# System.String Jason Norris

Check wheter a string is an valid e-mail address

C# System.String Scott Guthrie

Deserialize an XDocument to a generic type

C# System.Xml.Linq.XDocument asawyer

transposes the rows and columns of its argument

C# System.Collections.Generic.IEnumerable<T> Edmondo Pentangelo

Using IOControl code to configue socket KeepAliveValues for line disconnection detection(because default is toooo slow)

C# System.Net [T] NepTunic

Wraps DateTime.TryParse() and all the other kinds of code you need to determine if a given string holds a value that can be converted into a DateTime object.

C# System.String Phil Campbell

Provides a Distinct method that takes a key selector lambda as parameter. The .net framework only provides a Distinct method that takes an instance of an implementation of IEqualityComparer<T> where the standard parameterless Distinct that uses the default equality comparer doesn't suffice.

C# System.Collections.Generic.IEnumerable<T> Martin Rosén-Lidholm

check value is null

C# System.Object unkown

Truncate the specified string based on the given length. Replaces the truncated data to "..."

C# System.String Earljon Hidalgo

Convert a IEnumerable<T> to a Collection<T>

C# System.Collections.Generic.IEnumerable<T> Dawid van Zyl

A simple date range

C# System.DateTime P.Revington

An extension method that produce a comman separated values of string out of an IEnumerable<T>. This would be useful if you want to automatically generate a CSV out of integer, string, or any other primative data type collection or array. I provided 2 overloads of this method. One of them accepts a separator and the other uses comma "," as default separator. Also I am using another shortcut extension method for foreach loop.

C# System.Collections.Generic.IEnumerable<T> Muhammad Mosa

Returns true if two date ranges intersect.

C# System.DateTime Walter Quesada

Converts an array of any type to List<T> passing a mapping delegate Func<object, T> that returns type T. If T is null, it will not be added to the collection. If the array is null, then a new instance of List<T>() is returned.

C# System.Array James Levingston

Make easily accessible some functions available in HttpUtility into an Extension.

C# System.String Earljon Hidalgo

Parse a string to any other type including nullable types.

C# System.String Jigar Desai

Validate Email ID in C#

C# System.Net.Mail Hitendra

Takes any IEnumerable<T> and converts it to a HashSet<T>

C# System.IEnumerable<T> FloppyMan

Returns the first few characters of the string with a length specified by the given parameter. If the string's length is less than the given length the complete string is returned. If length is zero or less an empty string is returned

C# System.String C.F.Meijers

Lets you easily figure out ifdateTime holds a date value that is a weekend.

C# System.DateTime DavidV

Determines whether a collection is null or has no elements without having to enumerate the entire collection to get a count.

C# System.Collections.Generic.IList<T> Kelly Adams

OrderBy is nice, except if you want to sort by multiple properties or want an easy way to distinguish between ascending and descending.

C# System.Collections.Generic.IEnumerable<T> Adam Weigert

Returns the index of the first occurrence in a sequence by using the default equality comparer or a specified one.

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Forces your browser to download any kind of file instead of trying to open it inside the browser (e.g. pictures, pdf, mp3). Works in Chrome, Opera, Firefox and IE 7 & 8!

C# System.Response Mikhail Tsennykh

iterates through an IEnumerable<T> and applies an Action

C# System.Collections.Generic.IEnumerable<T> Jon Erickson

Shuffles an IEnumerable list

C# System.Collections.Generic.IEnumerable<T> Wes Caldwell

Get the actual age of a person

C# System.DateTime Detlef Meyer

It returns deep copy of the object.

C# System.Type Omkar Panhalkar

Returns true when a integer is a prime.

C# System.Int32 Fons Sonnemans

Extension for simplify usage of XmlSerializer class. Add extension to any object serialize it to xml. Add extension to string and stream to deserialize objects. All extensions with first check about default constructor

C# System.Object WaSaMaSa

c# version of "Between" clause of sql query

C# Type Raveendra sharma

Returns the range of elements between the specified start and end indexes. Negative numbers count from the end, rather than the start, of the sequence. Values of 'end' larger than the actual sequence are truncated and do not cause index-out-of-bounds exceptions. Functionally very similar to Python's list[x:y] slices.

C# System.Collections.Generic.IEnumerable<T> Joe Smith

Draw and fill a rectangle with some (or all) the angles rounded.

C# System.Drawing.Graphics Mattia Belletti

Checks if a given string contains any of the characters in the passed array of characters.

C# System.String Jonas Butt

Creates a string for logging purposes from an Exception. Includes the InnerException(s), Stacktrace et cetera.

C# System.Exception Mark de Rover

Gets the first assembly attribute of the specified type from the assembly it is called from.

C# System.Reflection.Assembly James Michael Hare (BlackRabbitCoder)

Extension methods on HtmlDocument used to read, write and delete cookies in Silverlight applications.

C# System.Windows.Browser.HtmlDocument Fons Sonnemans

Two methods that extends DataGridView control to save and load columns configuration to specified XML file. More informations (in Polish, example in English) at: http://kozub.net.pl/2012/02/22/datagridview-konfiguracja-kolumn-oraz-zapis-i-odczyt-stanu/ http://kozub.net.pl/2012/03/21/c-extension-methods/

C# System.Windows.Forms.DataGridView Marcin Kozub

Convert a String into CamelCase

C# String Anonymous

Method returns the max length specificed for property

C# System.Func A.Ben

Json Conversion, uses DataContractJsonSerializer to deserialize item

C# T Arek Bal

Log SharePoint Exception via SPDiagnosticsService for Debugging (result : 0000 Unexpected My Method Name : Attempted to divide by zero. 220da18b-1517-4230-90ac-91117ceaea33 )

C# void http://mb-seifollahi.ir

This is extension method for format the data time into the string with pattern specific and current culture. For more information please read at my blog http://weblogs.asp.net/thangchung/archive/2010/11/01/datetime-formating-extension-method.aspx

C# System.DateTime thangchung

Caches the results of an IEnumerable.

C# System.Collections.Generic.IEnumerable<T> YellPika

Turns any object to Exception. Very useful!

C# System.Exception Francisca Garse

Begin an XAML Storyboard using the async/await pattern instead of using the completed event.

C# Windows.UI.Xaml.Media.Animation.Storyboard Fons Sonnemans

Checks to see if a string represents a valid GUID. Source of the function: Original code at https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=94072&wa=wsignin1.0#tabs

C# System.String Gaston Verelst

returns default value if string is null or empty or white spaces string

C# System.String Alexander Gubenko

Validation algorithms for Polish identification numbers NIP, REGON & PESEL.

C# System.String Marcin Kozub

Moves a FileInfo instance to a specified path and rename it when already existing.

C# FileInfo Peter Rietveld

Converts English Numbers to Persian Numbers

C# System.String Mohammad Dayyan

Converts an Enumeration type into a dictionary of its names and values.

C# System.Type Daniel Gidman

Recursively create directory based on the given path. If the given path doesn't exist, it will create until all the folders in the path are satisfied.

C# System.IO Earljon Hidalgo

Concatenates a specified separator String between each element of a specified enumeration, yielding a single concatenated string.

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Determines if a string is a valid ISIN (International Securities Identification Number) code.

C# System.String JP Negri

Converts string to a title case.

C# System.String Earljon Hidalgo

A modification to the AddDay function that adds an integer number of weekdays to a date, starting the count at the first weekday after the current day. This is a typical method for calculating B2B service delivery and billing due dates.

C# System.DateTime Lee Harding

Checks if the date is between the two provided dates

C# System.DateTime hybrid2102

Returns all combinations of a chosen amount of selected elements in the sequence.

C# System.IEnumerable<T> Steven Jeuris

Returns true when a string is a valid url

C# System.String unkown

Returns a Task<IEnumerable<TResult>> to be used with the new async / await keyword.

C# System.Data.Services.Client.DataServiceQuery<TResult> Sebastian Dau

Returns true if the type it is called upon is a System.Nullable<> wrapped type.

C# System.Type James Michael Hare (BlackRabbitCoder)

Is essentially a modified version of Type.IsSubClassOf that supports checking whether a class derives from a generic base-class without specifying the type parameters. For instance, it supports typeof(List<>) to see if a class derives from the List<T> class. The actual code was borrowed from http://stackoverflow.com/questions/457676/c-reflection-check-if-a-class-is-derived-from-a-generic-class.

C# System.Type Dennis Doomen

Gets the last date of the month of the DateTime.

C# System.DateTime Brendan Enrick

Returns a selected value when the source is not null; null otherwise.

C# System.Object Steven Jeuris

Memoize afunction

C# System.Func P.Revington

Allows you to filter an IEnumerable<T>

C# System.Collections.Generic.IEnumerable<T> Jeff Reddy

Serializes an object to XML

C# System.Object Jason Marcell

Returns true when a given string is not null or empty

C# System.String unknown

Converts any type to another.

C# System.Object Piero Alvarez Fuentes

Serializes objects to an xml string. (Does not provide error handling if the object is not serializable.)

C# System.Object asawyer

Returns the plural form of the specified word.

C# System.String Shawn Miller

Since System.Linq.Enumerable.Aggregate throws a System.InvalidOperationException in case the given list is empty you can't use this function in a complex linq expression. This aggregate version simply returns a defaultvalue if the list is empty

C# System.Collections.Generic.IEnumerable<T> RW

Gets the value of a property in a object through relection

C# System.Type Sanction10

Convert a Stream to an array of bytes.

C# System.IO.Stream Chuhukon

Converts entire DataTabel To XDocument

C# System.Data.DataTable Meysam Javadi

Transforms a DataTable in Excel (xls). Requires Excel Library (https://code.google.com/p/excellibrary/)

C# System.Data.DataTable Raphael Augusto Ferroni Cardoso

Converts a System.DateTime object to Unix timestamp.

C# System.DateTime Koen Rouwhorst

Equals method that lets you specify on what property or field value you want to compare an object on. Also compares the object types. Useful to use in an overridden Equals method of an object.

C# System.Object joaomgcd

Appends a formatted string and the default line terminator to to this StringBuilder instance.

C# System.Text.StringBuilder Koen Rouwhorst

Provides an overload to String.Contains to specify a StringComparison (i.e. allows for case-insensitive searches).

C# System.String Brian Dukes

List To Datatable

C# DataTable, C#, List Keyur Panchal

Converts an Array of arbitrary type to an array of type T. If a suitable converter cannot be found to do the conversion, a NotSupportedException is thrown.

C# System.Array Brandon Siegel

Checks whether the type is Boolean.

C# System.Type kevinjong

This extension method replaces an item in a collection that implements the ilist<t> interface

C# System.Collections.Generic.IList<T> Otto Beragg

DateDiff in SQL style. The following DateParts are implemented: - "year" (abbr. "yy", "yyyy") - "quarter" (abbr. "qq", "q") - "month" (abbr. "mm", "m") - "day" (abbr. "dd", "d") - "week" (abbr. "wk", "ww") - "hour" (abbr. "hh") - "minute" (abbr. "mi", "n") - "second" (abbr. "ss", "s") - "millisecond" (abbr. "ms")

C# System.DateTime Jonnidip

Checks whether the type is string.

C# System.Type kevinjong

C# version of In clause of sql query.

C# System.Type Raveendra sharma

This method takes away the need for writing two lines for TryParse and gives users an option of returning a default number.

C# System.Int32 Avik

Takes a string of text and replaces text matching a link pattern to a hyperlink

C# System.String Andy T

Splits an enumerable into chunks of a specified size.

C# IEnumerable Entroper

Unified advanced generic check for: DbNull.Value, INullable.IsNull, !Nullable<>.HasValue, null reference. Omits boxing for value types.

C# System.Object Den

Helper method to retrieve a nullable value of a column from a datareader.

C# System.Data.Common.DbDataReader Fons Sonnemans

Generate slugs for friendly urls.

C# System.String Lucas

Turns any object to null

C# System.Object Francisca Garse

Simple way to Get the first and last day of the specified date.

C# System.String Earljon Hidalgo

Validates whether a string is a valid IPv4 address.

C# System.String Arjan Keene

Makes it easier to retrieve custom attributes of a given type from a reflected type.

C# System.Type James Michael Hare (Black Rabbit Coder)

Typical standard deviation formula set in LINQ fluent syntax. For when Average, Min, and Max just aren't enough information. Works with int, double, float.

C# System.Double, System.Float ParrottSquawk

Parse a string value to the given Enum

C# System.String unkown

Gets a nullable DateTime object from a string input. Good for grabbing datetimes from user inputs, like textboxes and querystrings.

C# System.DateTime Graham Peel

Use the Get[Type] functions that are part of the IDataReader but by passing the field name as a string as opposed to the field ordinal as int. Allows assigning default values for null values returned by the datareader.

C# System.Data.IDataReader Jeff Reddy

Convert an IEnumerator<T> to IEnumerable<T>.

C# System.IEnumerator<T> Richard Dingwall

somtimes one needs to split a larger collection into multiple smaller ones, this one does so use deferred execution

C# System.Collections.Generic.IEnumerable<T> Eckhard Schwabe

Clones a DataRow - including strongly typed DataRows.

C# System.Data.DataRow Robert M. Downey

Makes it possible to conditionally append to a StringBuilder while keeping it fluent

C# System.Text.StringBuilder Lasse Sjørup

Allows you to treat an IDataReader from a database query as enumerable so that you can perform LINQ operations on it.

C# System.Data.IDataReader James Michael Hare

Checks if a string value is numeric

C# System.String unknown

Starts execution of IQueryable on a ThreadPool thread and returns immediately with a "end" method to call once the result is needed.

C# System.Collections.Generic.IEnumerable<T> ulrikb.worldpress.com

I did not write this I just found it very useful, check http://stackoverflow.com/questions/7244 for original post.

C# System.Enum JA

Converts the pascal-cased Name property of a type to a displayable name.

C# System.Type Jeroen de Zeeuw

Checks if an integer is a number

C# System.Int32 McBrover

A set of extension methods that make it easy to mask a string (to protect account numbers or other personal data). For example, you could mask a SSN of 123456789 to be ******789.

C# System.String James Michael Hare (BlackRabbitCoder)

Validate email id

C# system.mail john

Generic recursive FindControl.

C# System.Web.UI.Control John Adams

Typical standard deviation formula set in LINQ fluent syntax. For when Average, Min, and Max just aren't enough information.

C# System.Double ParrottSquawk

Convert string to decimal

C# System.String Túlio Henrique Thomé

It converts string to integer and assigns a default value if the conversion is not a success

C# System.String Sathish Kumar

Simplest way to get a number of bytes at different measures. KB, MB, GB or TB,

C# System.Int32 José Fidalgo H.

return default value if string is null

C# System.String Alexander Gubenko

IsUnicode

C# System.String Mehdi Miri

Returns the last few characters of the string with a length specified by the given parameter. If the string's length is less than the given length the complete string is returned. If length is zero or less an empty string is returned

C# System.String C.F. Meijers

It returns true if string is null or empty or just a white space otherwise it returns false.

C# System.String Omkar Panhalkar

Determines if a date is within a given date range

C# System.DateTime Charles Cherry

Returns a string with the content of the input stream

C# System.IO.Stream Jonnidip

A bunch of extensions that work with SearchResult to retrieve its data.

C# System.DirectoryServices.SearchResult john Simons

Some time you want to get a nested property but a property in the chain is null then to avoid exception of Null Exception you must check all property in chain opposite of null

C# All Types Reza Arab Ghaeni

Dispose an object if it implement IDisposable. Especially useful when working with interfaces and object factories, and IDisposable may or may not found on concrete class.

C# System.Object MatteoSp

Convert a NewLine to a Html break

C# System.String unknown

The opposite of TakeWhile, inverts the expression and passes to TakeWhile so that instead of taking while an expression is true, you take until an expression is true.

C# System.Collections.Generic.IEnumerable<T> James Michael Hare (BlackRabbitCoder)

Rounds a TimeSpan value to the nearest timespan given

C# TimeSpan slowpython

This method selects a random element from an Enumerable with only one pass (O(N) complexity). It contains optimizations for argumens that implement ICollection<T> by using the Count property and the ElementAt LINQ method. The ElementAt LINQ method itself contains optimizations for IList<T>

C# System.Collections.Generic.IEnumerable<T> Stilgar

This is an extension that I use for doing strongly typed databinding to controls in a winforms project. I dislike using strings to databind because they do not generate compiler errors when the bound object changes. This extension allows you to, instead of using a string, use an expression to bind to for both the control property and the object property.

C# System.Windows.Forms.Control http://stackoverflow.com/questions/3444294/strong-typed-windows-forms-databinding

Reverses the order of the list that you wish to enumerate.

C# System.IEnumerable<T> Jonathan Crossland

Send an email using the supplied string.

C# System.String Sean Dorsett

Type-safe Include: a completely type-safe way to include nested objects in scenarios with DomainServices and RIA in, for example, Silverlight applications. Example: Include(x=>x.Parent) instead of Include("Parent"). A more detailed explanation can be found at http://www.chrismeijers.com/post/Type-safe-Include-for-RIA-DomainServices.aspx

C# System.Data.Objects.ObjectQuery<T> Chris Meijers

First or default extension method for NHibernate 3.0 and its new query API QueryOver.

C# Nhibernate.QueryOver Mateusz Wajcowicz

Case-insensitive replace method

C# System.String Ricardo Peres

Checks if any value type is empty.

C# System.ValueType Patrick A. Lorenz

Scales a Image to make it fit inside of a Height/Width

C# System.Image Robert Booth

Convert datatable field to int32

C# System.Int32 David Silva ( invalidtruck)

This is a recursive function to get all child controls under the target control.

C# System.Control Ryan Helms

Show an XAMP Popup using the async/await pattern instead of using the completed event.

C# Windows.UI.Xaml.Controls.Primitives.Popup Fons Sonnemans

Check that the given string is in a list of potential matches. Inspired by StackOverflow answer http://stackoverflow.com/a/20644611/23199

C# System.String Phil Campbell

Strip a string of the specified substring or set of characters

C# System.String C.F.Meijers

Supplements String.Format by letting you get properties from objects

C# System.String Lasse Sjørup

Convert a input string to a byte array and compute the hash.

C# System.String Alvaro Torres Tatis

Limit a value to a certain range. When the value is smaller/bigger than the range, snap it to the range border.

C# System.IComparable Steven Jeuris

Make adding to list fluent and conditioned

C# System.Collections.Generic.List<T> Lasse Sjørup

Flatten an IEnumerable<string>

C# System.IEnumerable<string> Yves Schelpe (yves.schelpe@gmail.com)

Shortcut for System.String.Format

C# System.String Adam Weigert

"SELECT DISTINCT" over a DataTable. Handles multiple columns selection.

C# System.Data.DataTable Jonnidip

Datatable to List

C# datatavle, List Keyur Panchal

A cleaner way to get values from Session

C# HttpSessionStateBase Mark Wiseman

Converts a file on a given path to a byte array.

C# System.String Kris Bulté

Execute a SQL command directly on a DbConnection. Needless to say that the other ExecuteXXX methods can be implemented as well. Implementing the method at DbConnection level makes it available for SQLConnection, OleDbConnection, ...

C# System.Data.Common.DbConnection Gaston Verelst

Returns whether or not a DateTime is during a leap year.

C# System.DateTime Brendan Enrick

An extenssion function to work like the extend method of javascript. It takes the object and merge with oder, but only if the property of the other object has value.

C# System.Object Luiz

A 'fluent' logic extension method that takes a value (can be anything) and a function that returns another value (can be anything) based on its logic. This is useful for both evaluating and optionally returning a value without declaring a temporary variable for the value.

C# System.Object James White

Adds a css class to the webcontrol. Instead of having to pass one string to the CssClass property, you can add them one by one with the AddCssClass extension method. This can come in handy when a webcontrol has a default class (from the ASP.NET markup) and then needs additional classes based on a condition (like whether or not a user is logged in).

C# System.Web.UI.WebControls Kristof Claes

متدی برای حل مشکل وارد کردن ي و ك عربی توسط کاربر و تبدیل به ی و ک فارسی. توسط محمد کمائی

C# String Mohammad Komaei

Convert an CamelCase enum name to displayable string

C# System.Enum AdamTha

It returns reader lines which can be retrieved from lamba statement

C# System.Data.SqlClient.SqlDataReader Credit goes to Jon Skeet

Compiles a string into an assembly. .NET 4

C# System.String Dan Gidman

Returns the plural of a word.

C# System.String Marco de Brouwer

Fake immutability in an existing list class by adding a "With" and "Without" method

C# System.Collections.Generic.IList<T> unknown

Multiple ways to check if an enum has description

C# Enum Nitin Chaudhari

Adds an element to an IEnumerable (System.Linq.Concat only adds multiple elements)

C# System.Collections.IEnumerable<T> B.W. Kemps

A generic method to add databinding to a control. This method brings type safety for the sake of better code maintainability.

C# System.Windows.Forms.ControlBindingsCollection Alireza Mokhtaripour

Removes items from a list based on a condition you provide. I have a feeling this should exist already but I can't find it. You can get the same results using 'where' but this method operates on the collection itself.

C# System.Collections.Generic.ICollection<T> Chris Meijers

Converts a DataRow into a Hashtable.

C# System.Data.DataRow Jonnidip

Gets the MD5 value of a given file.

C# System.String Earljon Hidalgo

A simple type safe method to find a parent control

C# System.Web.UI.Control Rob White

This is submitted as two extension methods as they work together. It is based off of an class designed by sfabriz @ http://www.osix.net/modules/article/?id=761 He has another class that does something a little different but I thought this was a wonderful piece of code so encapsulated it here. I only claim authorship of the conversion and not the underlying logic.

C# System.String Daniel Gidman

Convert DateTime to ShamsiDateString

C# System.DateTime Abbas Noorali

Wraps the usage of some DataTable.DefaultView properties to return sorted rows filtered on a custom filterexpression. For documentation on what to put in the whereExpression and the orderByExpression, refer to the MSDN documentation of DataTable.DefaultView.RowFilter and DataTable.DefaultView.Sort.

C# System.Data.DataTable Dan Pettersson

Get the elapsed time since the input DateTime

C# System.DateTime Jonnidip

The idea behind the ToFriendlyDateString() method is representing dates in a user friendly way. For example, when displaying a news article on a webpage, you might want articles that were published one day ago to have their publish dates represented as "yesterday at 12:30 PM". Or if the article was publish today, show the date as "Today, 3:33 PM".

C# System.DateTime jaycent

Calculates the SHA1 hash value of a string and returns it as a base64 string.

C# System.String Steve Hiner

Validates whether a string is compliant with a strong password policy.

C# System.String Arjan Keene

Returns true if the type can be considered numeric

C# System.Type Tim Scott (lunaverse.wordpress.com)

StringFormat Extension Style

C# String Mehran KeyArash

Csharp equivalent of Linux / Unix Command: inet_aton. The inet_aton() extension method converts the specified ipaddress, in the Internet standard dot notation, to a network address.

C# System.Net DotNerd

ToEnum - with nullable type

C# Enum chris_mckelt

Returns the null when there's null first element in the sequence instead of throwing an exception

C# System.Collections.Generic.IEnumerable<T> Jason Briggs

Given a line from a CSV-encoded file, split it into fields.

C# System.String David Bakin

Light-weight extension to output time. If you need additional human readable strings

C# TimeSpan Greg Wilson

Compare Strings like in SQL

C# String Raphe

Dynamically adds a javascript file (.js) to a page even if using master page.

C# System.Web.UI.Page Paulo Castilho

Determines if the object is null or empty. string is evaluated with empty. Collections, Arrays and Dictionaries are evaluated for 0 items (items themselves may be null) All other objects are evaluated as null or not null.

C# System.Object Daniel Gidman

Validate if a String contains a GUID in groups of 8, 4, 4, 4, and 12 digits with hyphens between the groups. The entire GUID can optionally be enclosed in matching braces or parentheses.

C# System.String Alvaro Torres Tatis

Convert a (A)RGB string to a Silverlight Color object

C# System.String Fons Sonnemans

Converts any type to another.

C# ChangeType Piero Alvarez Fuentes

Merges three sequences by using the specified predicate function.

C# System.IEnumerable<T> Steven Jeuris

Dynamically adds a cascading style sheet (a.k.a. CSS) file to a page even if using master page.

C# System.Web.UI.Page Paulo Castilho

Allows you to clone an etire generic list of cloneable items.

C# System.Collections.Generic.IList<T> Jeff Reddy

Returns datetime corresponding to last day of the month

C# System.DateTime Victor Rodrigues

Finds the index of the first of last occurence which matches the predicate.

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Convert string to int32

C# System.String Túlio Henrique Thomé

Returns a MemoryStream from a Byte array

C# System.Byte Jonnidip

Returns true if the object it is called upon is the default of its type. This will be null for referece types, zero for integer types, and a default-initialized struct for structs.

C# System.Object James Michael Hare (BlackRabbitCoder)

Dumps the object as a json string. Can be used for logging object contents.

C# Object Vincent van Proosdij

Helper methods to simplify development. Prevent common LINQ performance mistakes.

C# System.Collections.Generic.IList<T> Fons Sonnemans

This method will take any DataTable and remove duplicate rows based on any column.

C# System.Data.DataTable John D. Sanders

Modify the querystring of the current URL (or a passed in URL) to either add, update or remove parameters.

C# UrlHelper Chris Pratt

Returns a string that represent a csv representation of the referenced T in the IEnumerable<T>. You can also generate a columns header (the first row) with the name of the serialized properties. You can specify the name of the properties to include in the csv file. If you don't specify anything it will includes all the public properties.

C# System.Collection.Generic.IEnumerable<T> Lorenzo Melato

Repeat a string N times

C# String Robert E. Bratton

Removes items from a collection based on the condition you provide. This is useful if a query gives you some duplicates that you can't seem to get rid of. Some Linq2Sql queries are an example of this. Use this method afterward to strip things you know are in the list multiple times

C# System.Collections.Generic.ICollection<T> Chris Meijers

If you get Turkish inputs you can use this method to create url slugs

C# System.String Serdar Büyüktemiz

XML to Json

C# XML, JSON, C# Keyur Panchal

Checks whether the type is DateTime.

C# System.Type kevinjong

takes a string, replacing special characters and spaces with - (one dash per one or many contiguous special charachters or spaces). makes lower-case and trims. good for seo.

C# System.String esp

Check whether a collection is null or doesn't contain any elements.

C# System.Collection.Generic.IEnumerable<T> Dimaz Pramudya

Sets all values.

C# System.Array Nathan Brown

Get column value bu name from IDataReader.

C# System.Data.IDataReader Dumitru Condrea

Extention method to string for String.Format

C# String Rino Reji Cheriyan

Converts a decimal to a string using the current UI culture

C# System.Decimal Guy Van den Nieuwenhof

Convert a String Value to Corresponding Enum Value

C# Generic Anonymous

Nicely formatted file size. This method will return file size with bytes, KB, MB and GB in it. You can use this alongside the Extension method named FileSize.

C# System.String Earljon Hidalgo

Allows user to call an action / func delegate without having to check for null delegate

C# System.Delegate Juan Lopez

Converts an IEnumberable<T> to an HTML DataTable.

C# System.Collections.Generic.IEnumerable<T> Alex Friedman

Finds if the int is the specified range

C# System.Int32 Marwan Aouida

Returns the first string with a non-empty non-null value.

C# System.String Phil Campbell

Tells whether a value can be coalesced into a boolean

C# String Anonymous

a case-insensitive version of String.Contains()

C# System.String Jared Par

returns a formatted string on a nullable date

C# System.DateTime C.F.Meijers

Converts a regular DateTime to a RFC822 date string used for RSS feeds

C# System.DateTime unknown

Check whether the specified string contains an array of strings for each.

C# System.String kevinjong

Splits long string into smaller parts with given length.

C# System.String Marcin Kozub

Checks if two DataTable objects have the same content.

C# System.Data.DataTable Jonas Butt

Returns a formatted string on a nullable double

C# System.Double C.F. Meijers

This extension increase the readability of your code.

C# System.String Jan Fellien

Calling Value.ToString on a System.Nullable<T> type where the value is null will result in an "Nullable object must have a value." exception being thrown. This extension method can be used in place of .ToString to prevent this exception from occurring.

C# System.Nullable<T> Chris Rock

Count-based extensions which make checking the length of something more readable. * Updated on 2010-01-16 following suggestion from @Sane regarding the use of Count() in None(). Switched to Any(). Thanks!

C# System.Collections.Generic.IEnumerable<T> Dan Atkinson

Provides a mechanism to wrap WPF user control code that causes an exception on the host WPF window. Notes: I use a separate DLL for all of my extensions which can cause additional challenges. Here are some tips; There are 3 assemblies required 2 of which are easy to add unless you know there nuances; "System.Windows.Controls" this requires "PresentationCore" & "PresentationFramework". "System.Windows" was the most interesting. Look for WindowsBase.DLL if you don't find a reference. Be sure it matches the .Net Framework version you are using..

C# UserControl Tom Kelly

json to xml

C# Json, XML, C# Keyur Panchal

On the layers of the directory path of a directory

C# System.String 亂馬客

This code allows you to change visibility of columns of any DataGridView component at program runtime. It shows simple window filled with list of columns of DataGridView. You can check columns on the list you want to be visible. Use this code with my other DataGridView extension methods http://extensionmethod.net/csharp/datagridview/load-save-configuration.

C# System.Windows.Forms.DataGridView Marcin Kozub

Calculates the visual size of a string if it would be displayed on the screen, i.e. as the text of a TextBlock.

C# System.String Matthias Glauch

Set the InputScope of TextBox on a Windows 7 Phone.

C# System.Windows.Controls.TextBox Fons Sonnemans

Gets the value of a databinded property-path from an object. The property can have the form "Product.Type.Group".

C# System.Object Chris Meijers

Returns true if the column exists in the DataReader, else returns false

C# System.Data.IDataReader Jonnidip

Returns datetime corresponding to day end

C# System.DateTime Victor Rodrigues

Splits a string into a NameValueCollection, where each "namevalue" is separated by the "OuterSeparator". The parameter "NameValueSeparator" sets the split between Name and Value.

C# System.String Jonnidip

Returns the left of a string, terminated by a certain character. If the character isn't found the whole string is returned. Ex: string s = "ab-23"; s.LeftOf(s, '-') returns "ab"

C# System.String Gaston Verelst

Allows chaining together actions to be taken place on the fly. It works with any object. Its a simple concept but I couldn't find any examples that does the same.

C# System.Variant Daniel Gidman

Returns a DateTime representing the Monday of the current week. Depends on System.Globalization

C# System.DateTime Charles Cherry

We all know that objects can be null, but when dealing with databases, a new null type shows up, the DBNull. This extention method detects it along with the null.

C# System.Object Hadi Lababidi

This is a set of extesion methods that sort a given list more about that on codeplex

C# System.Collection.Generic.IEnumerable<T> Tunisian

Splits a string into an enumerable collection of the specified type containing the substrings in this instance that are delimited by elements of a specified Char array

C# System.String Magnus Persson

Show Windows Phone Choosers using the async/await pattern instead of using the completed event.

C# Microsoft.Phone.Tasks.ChooserBase<T> Fons Sonnemans

Adds an item to a listbox as the last item, and makes sure it is visible.

C# System.Windows.Forms.ListBox David Bakin

Deletes the files in a certain directory that comply to the searchpattern. The searchpattern can contain * and ? (the normal wildcard characters). The function can also search in the subdirectories.

C# System.IO.DirectoryInfo Gaston Verelst

To<> Convert

C# C# Majid Safari

.NET 4.5 version of Enum.ParseUnstrict

C# System.Enum JohnnyOddSmile

Inspiration for this extension method was another DateTime extension that determines difference in current time and a DateTime object. That one returned a string and it is more useful for my applications to have a TimeSpan reference instead. That is what I did with this extension method.

C# System.DateTime jlafay

The provided DefaultIfEmpty will only accept an instance of T as the default value. Sometimes you need the default to be an IEnumerable<T>.

C# System.Collections.Generic.IEnumerable<T> ThatChuckGuy

takes a byte[], and ints for width/height. returns a byte[] for the new image. keeps a static copy of previously provided sizes to reduce GC activity.

C# System.Image esp

Determines whether an IEnumerable contains any items

C# System.Collections.IEnumerable Juan Agüí

Converts a JSON string to an object

C# System.String Otto Beragg

Gets the index of the give value in a collection. Is overloaded to take a start parameter as well.

C# System.Collections.Generic.IEnumerable<T> Daniel Gidman

Adds time to existing DateTime

C# DateTime Cătălin Rădoi

Finds the index of the nth occurrence of a string in a string

C# System.String Emad Alashi

Count all words in a given string. Excludes whitespaces, tabs and line breaks.

C# System.Int32 Earljon Hidalgo

When a silverlight MediaElement finishes playing, it does not rewind automatically. This extension method sets the MediaElement position at Zero and starts playing.

C# System.Windows.Controls.MediaElement Loek van den Ouweland

Converts from one type to another.

C# System.Collections.Generic.IEnumerable<T> Adam Weigert

Method for copying a folder to a new location

C# StorageFolder Dave Smits

Gets a query string value from a System.Web.UI.UserControl HTTP Request object.

C# System.Web.UI James Levingston

Shuffle an array in O(n) time (fastest possible way in theory and practice!)

C# System.Array Maarten van Duren

this method generates a Hyper Link to redirect user to Authentication form . gets Titla attribute of tag and inner Text of Tag and generate tag A . then returns user to referrer page .

C# System.String http://mb-seifollahi.ir

Increment counter at the key passed as argument. Dictionary is <TKey, Int>

C# System.Collections.Generic.Dictionary Krzysztof Morcinek

Gets the most inner (deepest) exception of a given Exception object

C# System.Exception Jonnidip

Foreach inline for the IEnumerable<T>.

C# System.Collections.Generic.IEnumerable<T> Leandro Boffi

Turns any object to null

C# System.Object Francisca Garse

Simply returns the value property from an XmlNode whether it's null or not. Simplifies using XmlDocuments.

C# System.Xml.XmlNode Dave Thieben

Uses the VisualTreeHelper in a WPF application to find a child of the type FrameworkElement by its name recursively.

C# System.Windows.FrameworkElement Matthias Glauch

Write all elements in the Enumeration to the Console

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Throw's a given exception is a given predicate is True

C# System.Object Adam

Converts an IEnumerable<IGrouping<TKey,TValue>> from a GroupBy() clause to a Dictionary<TKey, List<TValue>>.

C# System.Collections.Generic.IEnumerable James Michael Hare (BlackRabbitCoder)

Checks if the collection is null or empty

C# System.Collections.Generic.IEnumerable<T> Linquize

Checks to see if the given text is a valid palindrome or not.

C# System.Boolean Earljon Hidalgo

Gets an enumeration of assembly attributes of the specified type from the assembly it is called from.

C# System.Reflection.Assembly James Michael Hare (BlackRabbitCoder)

Creates a sentence from a variable name.

C# System.String Richard Bogle

clean the controls on a form. Please send suggestions.

C# System.Windows.Forms.Form Wallison R Santos

Add an string array to ListControl ( dropdown, listbox, radiobuttonlist, checkbox).

C# System.Web.UI.WebControls.ListItemCollection Matt G

Get the file size of a given filename.

C# System.Int64 Earljon Hidalgo

Used with IDataReader to return a DataTable from the reader.

C# System.Data.IDataReader Ralfich

This extension method will return all the parameters of an Uri in a Dictionary<string, string>. In case the uri doesn't contain any parameters a empty dictionary will be returned. Somehow I can't believe there is no standard method to do this though... Any additions and/or comments are quite welcome :)

C# System.Uri Andre Steenveld

combin datarow's field value to string

C# System.Data.DataRow RainmakerHo

Permit Enum Parse everytime with valid values using a defaultValue param

C# System.Enum rallets

Executes a function if a given predicate is true

C# System.Object Adam

Get's the date of the upcoming Sunday.

C# System.DateTime Charles Cherry

Different way to use String.Format

C# System.String Victor Rodrigues

GetPermutations

C# System.Collection.Generic.IEnumerable<T> Fons Sonnemans

Prints out a nullable datetime's value (if its not null) in the string format specified as a parameter. A final parameter is specified for what to print if the nullable datetime was, in fact, null.

C# System.DateTime Graham Peel

stable, in-place sort (mergesort) of a LinkedList<T>. LinkedList<T> has O(1) insertion, great for large lists. this lets you sort it.

C# System.Collections.Generic.LinkedList<T> Piers Haken

Strips unwanted characters on the specified string.

C# System.String Earljon Hidalgo

Checks if a given string contains any of the string array.

C# System.String kevinjong

This method extends the DirectoryInfo class to return the size in bytes of the directory represented by the DirectoryInfo instance.

C# System.IO.DirectoryInfo Joel Rosario Mathias

Allows you to compare a value to a list of values analogous to the 'In' statement in sql. This makes for a very friendly syntax that is (IMHO) superior to a list of 'or' clauses. Instead of : if (s=="John" || s=="Peter" or s=="Paul") one can write if (s.In("John","Paul","Peter"))

C# System.Object C.F. Meijers

Recursive find control method used for finding controls within templates.

C# System.Web.UI.Control Brendan Enrick

Runs action delegate for all controls and subcontrols in ControlCollection.

C# System.Web.UI ivan

A set of Dispatcher extenstions that make it easy to cleanly queue lambdas on the Dispatcher.

C# System.Windows.Threading.Dispatcher Will Sullivan

Copies a stream to another stream using a passed buffer. it also has an overload to pass a buffer length.

C# System.IO.Stream Maziar Rezaei

Creates an explicit copy of the given enumerable where the only values copied are the ones you designate.

C# System.Collections.Generic.IEnumerable<T> Daniel Gidman

It is like pipe operator in F# and is useful for chaining function calls especially in expressions. (More in http://foop.codeplex.com/)

C# System.Object Kaveh Shahbazian

Fixed version of AddWorkDays

C# AddWorkDays Kevin Cook

this method is convert integer or float money data to separated comma string that is simple to read

C# System.String vahid shahbazian

Takes all public properties of any object and inserts then into a dictionary

C# object Lasse Sjørup

Returns the identity of a value

C# object McBrover

Determines if an instance is contained in a sequence. Is the equivalent of Contains, but allows a more fluent reading "if item is in list", specially useful in LINQ extension methods like Where

C# Generic Joan Comas

Método de Extensión para convertir un String a cualquier tipo de Dato

C# System.String Jorge García Casalett

Bind to a ListControl (Dropdownlist, listbox, checkboxlist, radiobutton) in minimal amounts of code. Also returns true false if items are in the control after binding and sets the selected index to first value.

C# System.Web.UI.WebControls.ListControl Matt G

tries to parse a string to an int, returns zero if it is unable to parse

C# System.String Sean Biefeld

Map any object T to a delimited string and control how that string is formatted.

C# System.Object James Levingston

Spins up and executes the action within a thread. Basically fire and forget. Real big question here. Does anybody see any issues with thread management? I would like to update this with any code necessary to manage thread cleanup if necessary. I realize that this has the ability to create unsafe thread referencing if not written such that the contents of the action are exclusive to the scope of the action, but that is outside the purview of this extension

C# System.Object Daniel Gidman

mrchsoft.com

C# Extension Reza Chavoshi

Checks if the current day is a leap day

C# System.DateTime Ricardo Peres

Repeats a character a given number of times, a little cleaner shortcut than using the string constructor.

C# System.Char James Michael Hare (BlackRabbitCoder)

Creates a wrapper for the given event handler which unsubscribes from the event source immediately prior to calling the given event handler.

C# System.EventHandler Wayne Bloss

Gest the elapsed seconds since the input DateTime

C# System.DateTime Jonnidip

Try/Get pattern for XDocument attributes

C# System.Xml.Linq.XElement Mike Cales

Reverse a string

C# System.String unknown

Returns the squared value

C# System.Int32 unknown

Converts a String to a MemoryStream

C# System.String Rory Becker

if you want to lost wight of string , you can use gzip

C# Gzip,String Phakawan Wongpetanan

Convert a IEnumerable<T> to a ObservableCollection<T> and can be used in XAML (WPF, Silverlight, Windows Phone & Windows Store) projects

C# System.Collections.Generic.IEnumerable<T> Farhan Ghumra

Set the initial focus for a Silverlight ChildWindow.

C# System.Windows.Controls.ChildWindow Fons Sonnemans

Returns datetime corresponding to first day of the month

C# System.DateTime Victor Rodrigues

Uses the Euclidean Algorithm to determine the Least Common Multiplier for an array of integers

C# System.Int32 Jeff Reddy

Essentially the implementation of the sql 'isnull' function, allowing the string type (when null) to be replaced with another value.

C# System.String Steve Mentzer

This extension methods allows you to load/save location, size and window state (normal, maximized, minimized) of any form to single XML file at program runtime.

C# System.Windows.Forms.Form Marcin Kozub

Shuffle an ArrayList in O(n) time (fastest possible way in theory and practice!)

C# System.Collections.ArrayList Maarten van Duren

برای حل مشکل مقدار پیشفرض وقتی مقداری وجود ندارد

C# System.String سید محسن میرشاهرضا

Allows thread-safely raise any event.

C# System.EventHandler<T> Marcin Kozub

Checks whether the type is integer.

C# System.Type kevinjong

Copies elements from IEnumerable<T> into ObservableCollection<T>. Handy for converting LINQ results into a list appropriate for WPF databinding.

C# System.Collections.Generic.IEnumerable<T> Matt Nicholson

If a string contains a space or a comma or a newline, quotes it, suitable for a field in a CSV file.

C# System.String David Bakin

Converts a Timestamp to a String which can be used in a Oracle SQL Query

C# System.DateTime csonic

Convert image to byte array

C# System.Image Lucas

Trims or removes duplicate delimited characters and leave only one instance of that character. If you like to have a comma delimited value and you like to remove excess commas, this extension method is for you. Other characters are supported too, this includes pipe and colon.

C# System.String Earljon Hidalgo

--

C# System.Collections.Generic.IEnumerable<T> Thomas Kowalski

Remove from the given string, all characters provided in a params array of chars.

C# System.String Érico Luis Barrientos Leite

Creates a range of integers as an IEnumerable<Int32>.

C# System.Int32 Richard Bushnell

Sometimes it is required to collect exception information in textual format. This method serializes general info about exception and all included exceptions reccursively. I'm using this for sending email error reports.

C# System.Exception Andriy Kvasnytsya

Select a item in a DropDownList by value.

C# System.Web.UI.WebControls.DropDownList Carlos Alessandro Ribeiro

Repeats an action a number of times.

C# System.Int32 Richard Bushnell

Converts an integer to a Guid. This could be used within a unit test to mock objects.

C# System.Int32 Tom De Wilde

string formator,replece string.Format

C# string pedoc

ICollection interface has List type most of time, so this Extension allows to call RemoveAll() method with the same signature like on List

C# ICollection<T> Krzysztof Morcinek

Checks whether the type is derived from specified type or implemented of specified interface.

C# System.Type kevinjong

Set the stream position to the place where for example 10 lines will be returned when read to end.

C# System.IO.Stream smolesen

converts one type to another

C# System.IConvertible Márcio Fábio Althmann

Resizes width of a Windows control to the text that contains.

C# System.Windows.Forms.Control Gabriel Espinoza

Removes a css class from the webcontrol. Let's say you have a webcontrol (a label for example) with more than one css class: "defaultClass loggedIn". With the RemoveCssClass extension method, you can easily remove one of them.

C# System.Web.UI.WebControls Kristof Claes

Returns datetime corresponding to day beginning

C# System.DateTime Victor Rodrigues

Returns whether the sequence contains a certain amount of elements, without having to traverse the entire collection.

C# System.IEnumerable<T> Steven Jeuris

Caches the results of generator methods so that expensive enumerations are not repeated if they are enumerated multiple times. Yet it caches the results lazily, allowing for memory efficiency where possible.

C# System.Collections.Generic.IEnumerable<T> Andrew Arnott

Extend collections implementing IList to return a DataView. In cases where filters need to be applied to data, this extension will prove handy.

C# System.Collections.IList Felipe Ramos

Combines two strings (potentially each of them can be null) with an optional given separator the way you expect. Default separator is a single space.

C# System.String peSHIr

Returns the first X characters from a string.

C# System.String Robert M. Downey

Converts a uint (0xFFb2b2b2) to a Silverlight SolidColorBrush object.

C# System.uint Loek van den Ouweland

Remove HTML <br \> tags from the string

C# System.String unknown

Compares two money (decimal) variables ignoring differences above 0.01. Useful for comparing two calculated decimals. 73,414.IsEqualMoney(73,41) returns true.

C# System.Decimal Loek van den Ouweland

applies a function to the given value - best used with static methods

C# generic Carsten König

Upgrades an ArrayList to a generic List

C# System.Collections.ArrayList C.F.Meijers

Create a new Image from a byte array

C# System.Array Lucas

Returns an array of int containing all caracters that compose the number.

C# System.Int32 waldyrfelix

Determines whether the collection has exactly one element

C# System.Collections.Generic.IEnumerable<T> Brian Dukes

Returns a DateTime representing the Friday of the current week. Depends on System.Globalization.

C# System.DateTime Charles Cherry

Better way to read a C# Dictionary

C# IDictionary Kenneth Kasajian

A better IsNull() implementation. Returns true if object value is null or DBNull

C# System.Object Manos Aspradakis

Fast version of the RemoveAt function. Overwrites the element at the specified index with the last element in the list, then removes the last element, thus lowering the inherent O(n) cost to O(1). IMPORTANT: Intended to be used on *unordered* lists only.

C# System.Collections.Generic.IList<T> José María Calvo Iglesias

Delete all files found on the specified folder with a given file extension.

C# System.String Earljon Hidalgo

By default, ConfigurationManager.ConnectionStrings returns null if the requested connection string doesn't exist. Use this extension method if you want something a bit more snappy - an exception.

C# System.Configuration.ConnectionStringSettingsCollection Richard Dingwall

Converts a string to a boolean value if possible or throws an exception

C# String Anonymous

take all but the last item from an IEnumerable<T>

C# System.Collections.Generic.IEnumerable<T> Clinton Sheppard

returns true if a sequence is sorted

C# System.Collections.Generic.IEnumerable<T> Piers Haken

Enqueues all objects from an IEnumerable<T> to the specified queue.

C# System.Collections.Generic.Queue<T> Virtlink

This SplitUp() extension method takes a sequence and splits it up into subsequences that each have a maximum length. See http://peshir.blogspot.nl/2011/02/example-of-c-lazy-functional.html for more information.

C# System.Collections.Generic.IEnumerable<T> peSHIr

return the length of time between the start and current date

C# System.DateTime Sanction10

Execute code only on certain types

C# object Loek van den Ouweland

Convert a string to a byte array

C# string Daniel Pamich

This method returns true if the value is null otherwise it returns false

C# System.Type Omkar Panhalkar

Combines an IEnumerable<string> using Path.Combine(), which will use the separator character that is correct for the platform used. It is a shorter and more correct way to combine paths than just using + "\\" + . Requires "using System.IO;" at the top of your extension method class.

C# System.IEnumerable<string> Callum Rogers

Writes the specified StringBuilder to the file using the specified path. If the file already exists, it is overwritten.

C# System.Text.StringBuilder Érico Luis Barrientos Leite

Formats a string safely, without throwing any exceptions. Adds an exception message to the resulting string instead.

C# System.String Wayne Bloss

Removes all selected rows from datagridview and returns the response on success

C# System.Windows.Forms.DataGridView Pursanov Dmitry

This extension method trigers the default navigator with the address pointed by the string

C# System.Diagnostics Fernando Bravo

It returns true if string does not end with the character otherwise returns false. If you pass null or empty string, false will be returned.

C# System.String Omkar Panhalkar

Using extensions to provide a similar "Winforms.Controls" collection functionality. When implementing generics with System.Windows.Window extensions the VS2013 compiler starts throwing random exceptions, so following is using a static wrapper and each control type has to separated. On tested using VS2013..

C# WPF Controls Tom Kelly

Get string in between two seprators

C# System.StringSplitOptions Narender Singh

Determines if the collection contains any elements. If the argument is null, false will be returned. This is useful when you don't know in advance whether the collection will be null or not.

C# bool Abbas

List/Get all files in a specified folder using LINQ. Doesn't include sub-directory files.

C# System.Collections.Generic.List<T> Earljon Hidalgo

Using LINQ, gets the total size of a specified folder. It can also check sizes of subdirectory under it as a parameter.

C# System.Int64 Earljon Hidalgo

Return the remainder of a string s after a separator c.

C# System.String Gaston Verelst

Returns true if this string is any of the provided strings. Equivalent to IN operator in SQL. It eliminates the need to write something like 'if (foo == "foo1" || foo == "foo2" || foo == "foo3")'

C# System.String Ivan Ferić

Conveniently produces a exception from a given string.

C# String MrMostInteresting

returns true if string contains numeric chars

C# String UnstableMutex

Converts a given URI to a TinyUrl.com address. Utilises the TinyUrl.com website so requires that the application can access the server

C# System.Uri Craig Hawker

Returns whether the given date is the last day of the month.

C# System.DateTime Tom De Wilde

this method find your list without any Exception by List Name , Title and ListID

C# Microsoft.SharePoint.SPList http://mb-seifollahi.ir

It returns true if string does not start with the character otherwise returns false if you pass null or empty string, false will be returned.

C# System.String Omkar Panhalkar

DoubleBuffer any control

C# Generic ?

Upgrades a hashtable to a generic dictionary

C# System.Collections.Hashtable C.F.Meijers

Check if the string contains all the elements in the array.

C# System.String Jim

Rename a code that allows only stating the current name column and a new name.

C# System.Data.DataTable Raphael Augusto Ferroni Cardoso

Combines parts of 2 byte arrays

C# System.Array Linquize

Emulates PHPs ucwords - capitalize each word

C# String Stuart Sillitoe

Used in conjunction with GetChildren(), it will return a T from a list of children of a control. If you are looking to return a list of T, use FindControlsByType() at http://www.extensionmethod.net/Details.aspx?ID=310 Get Children is located at: http://www.extensionmethod.net/Details.aspx?ID=309

C# System.Control Ryan Helms

Ensures given file name will return a unique file name, using the format Filename - Copy, or Filename - Copy (n) where n > 1

C# string John Cornell

optionally executes an Action if the object is of the given type.

C# System.Object dave thieben

Convert a double to a string formatted using the local currency settings.

C# System.Double Inge Schepers

Increments a integer number by one

C# Int MrMostInteresting

Wraps an action with a try...catch of a specific exception

C# Action ytoledano

Converts all elements in an enumerable list from the its to a destination type by calling a provided conversion function

C# System.Collections.Generic.IEnumerable<T> Ricardo Peres

for reverse string

C# System.String Phakawan Wongpetanan

Updates items from the collection using a modified version of this collection. Useful in MVVM scenarios needing cancellable edition and delayed persistence.

C# System.Collections.Generic.ICollection<T> Lionel Ringenbach

Adds a single element at the beginning of an enumerator

C# System.Collections.IEnumerable<T> B.W. Kemps

Returns a number of random elements from a collection

C# System.Collections.Generic.IEnumerable<T> Timmy Kokke

Iterates over all the elements in a collection and performs the given action, usually given as a lambda.

C# System.IEnumerable<T> Ricardo Amores Hernández

Simplest way to get a number of megabytes.

C# System.Int32 José Fidalgo H.

Determines how many numbers compose the integer if it was represented as a string.

C# System.Int32 Phil Campbell

This ToString() version is null aware. That means it has different behaviors if the object's value is null or DBNull according to the NullOptions enum.

C# System.Object Hadi Lababidi

A handy extension method for System.String that eliminates this pattern when trying to avoid null reference exceptions. if (someString==null) someString=string.Empty;

C# System.String Steve Mentzer

Get the base value of CrmProperty object. This is used for interacting with DynamicEntity on Microsoft CRM.

C# Microsoft.Crm.Sdk.DynamicEntity Dimaz Pramudya

simple fluent assert for MSTest

C# System.Object neuecc

Extracts all fields from a string that match a certain regex. Will convert to desired type through a standard TypeConverter.

C# System.Array David Bakin

This method resizes a System.Drawing.Image and tries to fit it in the destination Size. The source image size may be smaller or bigger then the target size. Source and target layout orientation can be different. ResizeAndFit tries to fit it the best it can.

C# System.Drawing.Image Loek van den Ouweland

Get the uri to an file

C# StorageFile Dave Smits

Limits a value to a maximum. For example this is usefull if you want to feed a progressBar with values from a source which eventually might exceed an expected maximum. This is a generic extension method with IComparable<T> constraint. So every type which implements the IComparable interface benefits from this extension.

C# System.IComparable<T> Rainer Hilmer

Return's a random item from a IList<T>

C# System.Collections.Generic.IList<T> Ewerton Luis de Mattos

DoubleBuffer any control

C# Generic Paul Kemper

Simplest way to get a number of kilobytes.

C# System.Int32 José Fidalgo H.

Multiplies a TimeSpan by a number (int)

C# TimeSpan Loek van den Ouweland

Returns a the value of a Nullable type if it has a value or it will return a default value

C# System.Nullable<T> Robert Booth

Allow to get the HttpWebResponse event if the request wasn't successful, in order, for example, to know what went wrong

C# HttpWebRequest Krimog

Gets the ImageCodecInfo that corresponds to a ImageFormat.

C# System.Drawing.Imaging.ImageFormat Lucas

Sometimes you may need a Queue<T> that, once it hits a capacity, dequeues items automatically to maintain a certain maximum. While it may be best to derive a new type from Queue<T>, this will get it done much more quickly. This is very useful for maintaining a rolling average or a "history" feature.

C# System.Collections.Generic.Queue<T> David Harris

Adds an override to the System.Text.StringBuilder AppendLine method which takes a second parameter so can be used like AppendFormat but also creates a new line.

C# System.Text.StringBuilder Robin Norton

Convert a double to a string formatted using the culture settings (string representation) passed into the procedure.

C# System.Double Inge Schepers

Matches yourFace to myButt

C# System.Object jdoe

Scrolls to the bottom of a Textbox.

C# System.Windows.Forms.TextBox Sean Fox

صحت کد ملی

C# System.String Mehdi Miri

Return all messages after call Validate method on Microsoft EnterpriseLibrary Validation Block

C# Microsoft.Practices.EnterpriseLibrary.Validation.ValidationResults Alvaro Torres Tatis

Many times you need an XSD file for a report. I have created this extension to write the xsd based on the data table I feed it into the directory I set.

C# System.Data.DataTable John D. Sanders

Used in conjunction with GetChildren(), it will return a list of T from a list of children of a control. Get Children is located at: http://www.extensionmethod.net/Details.aspx?ID=309

C# System.Control Ryan Helms

Returns if a given string contains any of the characters provided in a params array of strings.

C# System.String Jason Jackson

for Repeat String .

C# System.String Mehrdad Ghasemi

Computes a product of all elements in the sequence.

C# System.Collections.Generic.IEnumerable<T> Edmondo Pentangelo

Checks if object is any of provided values separated by comma

C# System.Object Ivan Ferić

Create new Bitmap from resource image

C# System.Reflection.Assembly Algel

Returns true or false depending on if the given object is equal to the default(T) value of the type.

C# System.Object Adam

Determines whether a collection is null or has no elements without having to enumerate the entire collection to get a count.

C# System.Collection.Generic.IEnumerable<T> Kelly Adams

Indicates whether the specified IEnumerable collection is null or empty

C# System.Collections.IEnumerable Avi Harush

String Typed Exception Extension

C# Generic Exception Ferhat Celik

Return the current date and time

C# System.DateTime Thor Jack

Inspired from ye good old ruby on rails, provides you with new DateTime instances based on an integer you provide. Look at realfiction.net -> extension methods for more detail

C# System.Int32 Frank Quednau

For Philippine mobile code but can also be adjusted based on your mobile network code. Check if the given number is a valid formatted international number.

C# System.Boolean Earljon Hidalgo

Finds all the indexes of the give value or values in an enumerable list

C# System.Collections.Generic.IEnumerable<T> Daniel Gidman

Beukes

C# Int Anton

Repeats a sequence forever.

C# System.Collections.Generic.IEnumerable<T> Daniel Pratt

Provides a generic visitor Method Extension for more information, please have a look at my blog post : http://www.dotnetguru2.org/nicolaspenin/index.php?title=generic_visitor_implementation_thanks_to_0&more=1&c=1&tb=1&pb=1

C# System.Object Nicolas Penin

This method returns true if the value if not null otherwise it returns false.

C# System.Type Omkar Panhalkar

Get a value from AppSettings section of Web.Config and change its type to the correct one or return a default value in case the key doesn't exists.

C# Generic Adrián Maillo

Determines whether a IEnumerable<T> contains a specific value

C# System.Object Lucas

A simple multiplication extension. Backing idea is to overcome the ridiculous flaw in the Int32 value type when a regular multiplication overflows the Int32 value range. Along these lines it would also be possible to gracefully return larger values as e.g. longs, or as BigInt (when the BCL team gets around to implementing it ;-). But the example here sticks to the bounds of the Int32 range.

C# System.Int32 Arjan Keene

Determines if a type is static by checking if it's abstract, sealed, and has no public constructors.

C# System.Type jlafay

Throws a given Exception if the given object is equal to the default value for the type

C# System.Object Adam

this method find items of a Choice Field in a Sharepoint List

C# System.Collections.Generic.List<string> http://mb-seifollahi.ir

Randomize the Items in the list

C# System.Collections.Generic.IList<T> Ramaraju

formating the string with a custom user-defined format. # sign is input characters.

C# System.String Mojtaba kaviani

clear the contents of a StringBuilder object

C# System.Text.StringBuilder Manos Aspradakis

Checks if the two dictionaries have the same keys

C# IDicitionary mInternauta

Throws a given exception is any value in a set passes a given predicate

C# System.Collection.Generic.IEnumerable<T> Adam

Creates a string that is each the elements' ToString() values wrapped in the 'tag' that is passed as a param. Good for converting an IEnum<T> into a block of HTML/XML.

C# System.Collections.Generic.IEnumerable<T> Graham Peel

Gets all the indexes in which a certain substring appears within the string.

C# System.String Omer Raviv

Code that allows deleting a column stating the name

C# System.Data.DataTable Raphael Augusto Ferroni Cardoso

Speaks any object using the speech synthesis API

C# T totally professional rock star coder

BinarySerialize a List<T>

C# System.Collection.Generic.List RodrigoDotNet

Writes the entire contents of this stream to another stream using a buffer.

C# System.IO.Stream Magnus Persson

Returns true when a number is included in the specified collection.

C# System.Int32 Victor Rodrigues

get fist n charactor in string

C# System.String Phakawan Wongpetanan

Get a saved value from the app domain and convert it back to its original type

C# System.AppDomain Lee Hull

Conditionally formats any value type based on a Lambda Expression

C# System.ValueType Patrick A. Lorenz

Remove click event from given button.

C# System.Windows.Controls.Button Dumitru Condrea

Determines whether a variable of type T is contained in the supplied list of arguments of type T, allowing for more concise code.

C# System.Collections.Generic.IEnumerable<T> Winston Smith

Selects the object in a list with the maximum value on a particular property

C# List Extensions James Pattison

You don't need check whether the collection is null.

C# System.Collections.Generic.IEnumerable<T> Rrr

Select Last character in string .

C# System.String Mehrdad Ghasemi

For use with old school ado.net database command parameters. This basically converts the string to System.DBNull.Value if the string is null else it returns the string.

C# System.String Tomas Tomasson

This extension method joins the StringBuilder values

C# StringBuilder Müslüm ÖZTÜRK

Creates an IDictionary&lt;TKey, TValue&gt; from the IEnumerable&lt;TSource&gt; instance based on the key selector and element selector. This is distinct by using the built-in index of the dictionary instance for either adding or updating a keys corresponding value.

C# System.Collections.Generic.IEnumerable David Michael Pine

Returns an alphabetically sorted list for all public and instance properties, along with its associated values.

C# System.Object Alvaro Torres Tatis

Deserializa um arquivo binario em uma lista generica

C# System.Collection.Generic.List RodrigoDotNet

Allows enumaration of sets of characters by expressing them as a range, for example all the lowercase characters. Allows reverse order as well.

C# System.Char Figment Engine

Returns a boolean value of true if the item being compared is less than the value of the parameter.

C# System.IComparable<T> Richard Bushnell

Randomizes am IEnumerable<T>

C# System.Collections.Generic.IEnumerable<T> Joe

C# LINQ has no Sum method for TimeSpan. Here it is1

C# TimeSpan Joseph K

Attempts to retrieve a valid a result from your function one or more times with an optional 'in between' step (i.e. delay). Replaces a common code pattern with a more readable, shared pattern.

C# System.Int32 James White

This one allows you to get nested XML from within a node. Let's say you're parsing an HTML file using the XDocument class and you want to pull out the nested code including tags. This is what you can use!

C# System.Xml.Linq.XElement Jakub Kottnauer

Checks whether a number is odd

C# System.Int32 K M Thomas

Returns 'true' if a Boolean value is true.

C# bool Bradley Grainger

Filters out directories that are hidden

C# System.IO.DirectoryInfo Nitin Chaudhari

Truncates the given string by stripping out the center and replacing it with an elipsis so that the beginning and end of the string are retained. For example, "This string has too many characters for its own good."InnerTruncate(32) yields "This string has...its own good."

C# System.String Partial Method

Select Frist character in string .

C# System.String Mehrdad Ghasemi

Substitutes this: int? index = GetIndex(); if (index.HasValue && index.Value == 10) ...

C# System.Nullable<T> MatteoSp

Filters a list based on a comma-separated list of allowed values. This is a lot more concise than using a number of 'or' clauses

C# System.Collections.Generic.IEnumerable<T> Chris Meijers

Returns the excel column name from a column index

C# System.Int32 Victor Rodrigues

Returns the excel column index from a column name

C# System.String Victor Rodrigues

Works on Comparables to check whether the checked value is between two other values. Check relaifciotn.net -> extension methods for more details.

C# System.IComparable<T> Frank Quednau

Determines whether a string has multiple occurrences of a particular character. May be helpful when parsing file names, or ensuring a particular string has already contains a given character. This may be extended to use strings, rather than a char.

C# System.String Phil Campbell

Many times you may wish to impose boundaries on what a certain variable can be. This is especially useful for validating user input. For any comparable, it simply returns the value, truncated by a minimum or maximum

C# System.IComparable<T> David Harris

Returns count elements, beginning from the specified

C# System.Collections.Generic.IEnumerable<T> Sergei Bogachev

Sometimes it is required to remove some special characters like carriage return, or new line which can be considered as invalid characters, especially while file processing. This method removes any special characters in the input string which is not included in the allowed special character list.

C# string Naveen V

Determines if a class object implements an interface type and returns a list of types it actually implements. If no matching type is found an empty list will be returned.

C# System.Object James Levingston

Removes end of string if it equals to parameter, otherwise returns origin string

C# string Dmitry

Get the selected value of a DropDownList by returning the value stored in the forms collection. This allows you to turn EnableViewState off on a DropDownList and still easily retrieve the selected value

C# System.Web.UI.WebControls.DropDownList Jeremy Chapman

Converts a complex multitouch, pressure sensitive silverlight stylus object to a simple MouseInfo object.

C# System.Windows.Input.MouseEventArgs Loek van den Ouweland

Write a variable to System.Diagnostics.Debug.WriteLine() (Or other output method)

C# System.Object Rob Leclerc

Takes a DateTime object and reverses it to an SQL type string (yyyy-mm-dd hh:MM:ss)

C# System.String Jon Preece

Compute dateTime difference

C# DateTime Alex-LEWIS

Improve readability of string.Format

C# System.String Stephan Jun

Determines whether two String objects have the same value. Null and String.Empty are considered equal values.

C# System.String Omniscient Technology Inc

Add Data to Dropdownlist,Radiobutton List etc

C# Add Data to Dropdownlist,Radiobutton List etc Ramvilas Ramsevak Varma

Datatable to List

C# Keyur Keyur Panchal

Checks if a string contains no spaces

C# System.String R. van Duren

Allows you to create date very easily, like 19.June(1970)

C# System.Int32 Victor Rodrigues

C# extension to Fill and or Draw RoundedRectangle

C# System.Draw Jerry Knauss

Takes a section of a string given the start and end index within the string.

C# System.String Mathew Bollington

Split by expression

C# string[] David Seff

Formats any value type

C# System.ValueType Patrick A. Lorenz

Returns the remaining characters in a target string, starting from a search string. If the search string is not found in the target, it returns the full target string.

C# System.String Brett Veenstra

Extension Method which converts Datatable to HTML table

C# Vick Vick

An extension method to find the parent control of a specific type in asp.net

C# System.Web.UI.Control Haris Munawar

This method makes the caps for all words in a string

C# System.String Denis Stoyanov

Retrieve Querystring,Params or Namevalue Collection with default values

C# NameValueCollection Vishal Sharma

Often you have to set the text of lots of literal when databinding a ListView control in ASP.Net. This method lets you write that in one line.

C# System.Web.UI.WebControls.ListViewItem Timmy Kokke

These 2 extension method allows you to delete a folder or just purge all the folder content even if there are Readonly, System, and/or Hidden attributes files in it. The default Delete method doesn't work if there are files with Readonly, System, and/or Hidden attributes.

C# System.IO.DirectoryInfo John Simons

If input is null, returns empty string. Otherwise returns original input. After using this method, you can use all string methods without the danger of null exception.

C# string Joseph K

Save values checking length

C# String Neil Steventon

A simple method that adds 's' onto words. used when you return x record(s)

C# Russell Holmes Russell Holmes

get custom attribute helper

C# PropertyInfo UnstableMutex

EF 에서 문자열로 정렬 컬럼 지정하고 싶을때 사용하면 됩니다.

C# System.Linq.IQueryable<out T> Joseph Kwon

Converts a string to a primitive type or an enum type. Faster than tryparse blocks. Easier to use, too. Very efficient.

C# string Taylor Love

Append new child XmlElement to base XmlElement.

C# System.Xml.XmlElement Dumitru Condrea

Dynamic Print method for ExpandoObject

C# ExpandoObject Radu Matei

This extension method acts similarly to Directory.GetFiles except that the directory path is expressed as a virtual directory.

C# System.Web.UI Casey

Enqueues an aray of items to a Queue rather than having to loop and call Enqueue for each item.

C# System.Collections.Generic.Queue Mike Cromwell

Limits a piece of text to a certain maximum length for the purpose of showing it to the user as part of some (G)UI or report that has limited space.

C# System.String peSHIr

Identity function

C# T Anderson Vieira

Finds the nearest common ancestor for type based on the inheritance hierarchy.

C# System.Type David Hanson

String save/write in file

C# Satring, Save, Write, File, External Keyur Panchal

this extension method is Used in Library System Management for return Recive book Date if you use this method this add to Date.Now 14 Days with change the Year and Month Day

C# DateTime EbrahimKarimi

Use this method to easily check that a required querystring both exists and is of a certain type. This lets you fire off a few checks in your page_load and then write the rest of the code on the page safe in the knowledge that the querystring exists, has a value and can be parsed as the intended data type. If the querystring is not present or is an invalid type the user is sent to the RedirectUrl. Urls starting with a tilde (~) are also supported. This url is normally the next logical level up the tree such as an admin manaagement page, a product index page or if there isn't an appropriate page then you can send the user back to the homepage.

C# System.Web.UI.Page rtpHarry

Upper case first letter

C# C# Luã Govinda

Checks whether a number is even

C# System.Int32 K M Thomas

Returns a collection of string that matched on the pattern.

C# String Totet

Compute dateTime difference precisely

C# DateTime Alex-LEWIS

http://peshir.blogspot.nl/2011/02/safely-set-numericupdown-control-value.html

C# System.Windows.Forms.NumericUpDown peSHIr

Convert DateTime To PersianDate

C# PersianCalendar http://www.kaperco.com

Converts a string to upper-case but checks for null strings first

C# string Russell Holmes

Returns the object if it's not null or the first object which is not null.

C# System.Object<T> Weidling C

Perform a Trim() when the string is not null. If the string is null the method will return null.

C# System.String Tom De Wilde

insert item in the top of list

C# Insert Kerollos Adel

An C# extension method based on "LIKE" operator of T-SQL.

C# object Rafael Tadeu Bezerra Faria

Toggle to bool

C# C# Luã Govinda

C# LINQ has no Average method for TimeSpan. Here it is!

C# TimeSpan Joseph K

Will return the next occurring day of week

C# System.DateTime Tony Musico

Method returns the number of non-null or non-empty items wihtin a string array of length n.

C# System.String rishka

This extension method series represent shorthand version of Task.Factory.FromAsync (for .NET 4.0)

C# System.Action, System.Action<T1 ~ T16>, System.Func<TResult>, System.Func<TArg1 ~ TArg3, TResult> rkttu

yield all child controls recursivly

C# System.Web.UI.ControlCollection David Findley

if you Enter Some numbers in the Stack one number has inserted in Left Side and another one has inserted in Right Side.

C# DataStructure EbrahimKarimi

Recognizes vowels in European languages #i18n

C# System.char m93a

Convert decimal in string Timeformat (hh:mm)

C# string Andreas Seibel

Return a random string of a chosen length

C# String Stuart Sillitoe

Extension method for comparing dictionaries by elements (key pair values)

C# System.Collections.Generic.IDictionary Witold Szymaniak

Gets the specified percentage of the given value.

C# Double Nicky Ernste

Returns a List of T except what's in a second list, without doing a distinct

C# List Avraham Seff

Coalesce any like nullable types.

C# C# Generics David Michael Pine

Validate a string arithemetic expression

C# System.String Muhammed Haris K

Converts a string to a primitive type T, or an enum type T. Faster than tryparse blocks. Easier to use, too. Very efficient. Uses generics so the code is cleaner and more robust than doing a separate convert method for each primitive type.

C# system.string Taylor A Love

Converts the number of seconds to a string displaying hours and minutes

C# System.Int32 K M Thomas

Emulation of PHPs ucfirst()

C# String Stuart Sillitoe

TakeStartOfWeek

C# DateTime Extension Hakan YILMAZ

Coalesce any like nullable types.

C# Generics David Michael Pine

Generates random enumeration value

C# T pedoc

This extension method series represent shorthand version of Task.Factory.FromAsync (for .NET 4.5)

C# System.Action, System.Action<T1 ~ T16>, System.Func<TResult>, System.Func<TArg1 ~ TArg16, TResult> rkttu

Parse the string in exact data format with null check

C# System.String Anjum Rizwi

Compresses and Encrypts Data

C# byte[] Ben Adams

Extension method to split string by number of characters.

C# System.String Ahmer Sohail

Returns the current local time for the specified time zone.

C# System.TimeZoneInfo Greg Lyon

Convert string time(hh:mm) in decimal

C# decimal Andreas Seibel

If you need to show "Yes" or "No" depending on some bool property

C# string Djordje Djukic

ReplaceIgnoreCase

C# String Unknown

Extracts the underylying SQL query from an IQueryable datatype

C# IQueryable<T> Ori Samara

Returns the object if it's not null or the first object which is not null, With explicit reference for strings

C# System.Object<T> D.Magician

Validates that input text is a number

C# System.Windows.Forms.TextBox Ahmer Sohail

Converts any object to a dictionary

C# IDicitionary mInternauta

Merges two dictionaries

C# Dictionary mInternauta

Extract a string from an other string between 2 char

C# string tmcuh1982

Follows sequence with new element

C# IEnumerable<T> Nikoloz Pachuashvili

Converts a string to a timespan

C# System.String K M Thomas

Converts a timespan to a string displaying hours and minutes

C# System.TimeSpan K M Thomas

Converts a string to a double

C# System.String K M Thomas

LINQ ToList() extension method with an extra capacity argument. This can boost the speed of creating the list.

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

Add an ordinal to a number,

C# System.Int32 K M Thomas

These extension methods enable type casting between generic Action, generic Func, EventHandler, generic EventHandler and non-generic Action, non-generic Func, non-generic EventHandler as well as generic EventHandler and non generic EventHandler delegates in mscorlib and System.dll assembly.

C# DelegateCastingExtensions rkttu

Duplicates within an IEnumerable

C# IEnumerable Cătălin Rădoi

Gets a contrasting color based on the current color

C# Color Zack Wagner

Joins a series of strings connected by a separator.

C# IEnumerable<string> Entroper

Where string is not null or empty extension method for NHibernate 3.0 and its new query API QueryOver.

C# WhereStringIsNotNullOrEmpty Richard

Use this extention method with a lambda expression to replace the first item that satisfies the condition

C# System.Collections.Generic.IList<T> Brecht Bocket

Extension Method to Execute Delegate Based on Boolean Value

C# bool Brian Pruitt

Converts an integer to a timespan

C# System.Int32 K M Thomas

Awaitable fluent extensions for enumerables of task

C# IEnumerable<Task> Aleix Domènech

Floor, Ceiling, Midpoint and Rounding calculations for various time intervals.

C# System.DateTime Jeff Banjavcic

Reverse Words

C# string Ali HajiAbadi

This code will provide the Sunday DateTime from the week of DateTime object the extension method is called from.

C# DateTime Brent Coppock (original by Charles Cherry)

Converts a T[,] (rectangular array) to a T[][] (jagged array).

C# Object Siddhartha Gandhi

Determines if an instance is not contained in a sequence. Is the equivalent of Contains == false, but allows a more fluent reading "if item is not in list", specially useful in LINQ extension methods like Where.

C# Generic Joan Comas

Converts a Double to a String with precision

C# System.Double K M Thomas

An extension method that add the possibility calculate the Pearson correlation coefficient using the names of two columns of the data table in question.

C# System.Data.DataTable Mahmood Salamah

Find parent XElement from a provided name. Returns null if no match

C# System.Xml.Linq.XElement Andi Haviari

Simplified and elegant usage of ReaderWriterLockSlim that

C# System.Threading.ReaderWriterLockSlim Sharp IT, Maciej Rychter

Parse Class to XML

C# Class, XML Keyur Panchal

Calculates the next anniversary of an event after the initial date on the Gregorian calendar. Use the original event date or the event month/event day as a parameters. The optional parameter, preserveMonth will determine how to handle an event date of 2/29. Set to true will use February 28 for a standard year anniversary and set to false will use March 1 for a standard year anniversary.

C# System.DateTime Jeff Banjavcic

Selects the object in a list with the minimum or maximum value on a particular property

C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans

blowdart random test

C# int Ben Adams

Check either IList object is null or empty.

C# IList Muhammad Shoaib Ijaz

IDataReader extension to get values

C# System.Data.IDataReader Everton Thomas

The opposite of Any(). Returns true if the collection is empty, or if no item matches the predicate.

C# IEnumerable Entroper

Convert any list of objects to a select list

C# IEnumerable<SelectListItem> Djordje Djukic

et

C# et et

Concats a single item to an IEnumerable

C# Concat single item Bart Kemps

Checks whether the given integer value is between the start and end value.

C# Integer Sheraz Naseeb

Enqueues a generic collection of items

C# void David Seff

Gets the number of the week according to the definition of the ISO 8601

C# string João Mata

You can mangement Properties Settings.

C# System Omid Nasri

Get the current date time in Amsterdam

C# DateTime Marc van Steijn

Parse XML String to Class

C# XML String Keyur Panchal

C# with get claim value

C# Claim Fatih Erol

Return observable collection for IList object.

C# IList Muhammad Shoaib Ijaz

Creates a numeric list of integers starting at the current instance and ending at the maximum value.

C# System.Int32 Duane Wingett

Returns Dropdownlist Selected Value as Integer

C# Integer Andi Haviari

This extension method represents shorthand version of ReferenceEquals method.

C# Object rkttu

This code will provide the Sunday DateTime from the week of DateTime object the extension method is called from.

C# DateTime Brent Coppock (original by Charles Cherry)

Is a Extension for the ASPOS Word API.

C# ASPOS Word Extension Alain Schärer

Splits the given string by pascal case.

C# String Sheraz Naseeb

Dictionary Extension

C# Dictionary Extensions Cem Basaranoglu

بررسی باز بودن پورت

C# Extension Method Check Opened Port Mohammad Vafaei

Determines if specified string is DateTime. Its an improvement on Phil Campbell's version

C# System.String CodeMonkey

Object to decimal?

C# Object to decimal? Tomcat

enables calculation of big number

C# bignum lakh crore kumar paneer

Converts to and from ISO 8601 Week numbers

C# FromIso8601WeekNumber / ToIso8601WeekNumber Bart Kemps

Implict hashing

C# HashAlgorithm cia48621793

Turn any string formed with camel case into a human cased string.

C# System.String Piero Alvarez Fuentes

بررسی اعتبار کد ملی

C# System.String محمد مهدوی منش 09120611300

Get XML from Physical Path and Parse into Class

C# XML, Class Keyur PANCHAL

FirstMondayOfYear

C# FirstMondayOfYear Hakan YILMAZ

Serializes objects into and from XML documents

C# object ZEMMOURI

Remove trailling zeros from a decimal value

C# System.Decimal Alberto Silva

Legible way to remove ticks from a datetime. Use instead Add negative days

C# DateTime Rafael Tadeu Bezerra Faria

To<> Convert

C# C# Majid Safari

CopyTo without the second parameter, for when you just want to copy array A to array B verbatim and size is not a concern.

C# T[] Benedict Tough

Draw circles on Unity GameObjects

C# GameObject Loek van den Ouweland

Split the next part of this span with the given separator

C# ReadOnlySpan Fons Sonnemans

Compare Through a predicate every element of a list with the previous one

C# System.Collections.Generic.IEnumerable<T> Emanuele Rossi

Split any string using camel case pattern.

C# System.String Piero Alvarez Fuentes

string formator,replece string.Format

C# string pedoc

Finds first occurrence of a Unity Transform that satisfies the predicate

C# Transform Loek van den Ouweland

Just throw if you can

C# ThrowIf Jan Okwalski

Append() adds a value to the end of the sequence. Prepend() adds a value to the beginning of the sequence. This is usefull if you are not using .NET Core or .NET Framework 4.7.

C# IEnumerableOfT Fons Sonnemans

Replaces NULL with the specified replacement value.

C# System.String Takeshi, Fukuda

if you Enter Some numbers in the Stack one number has inserted in Left Side and another one has inserted in Right Side.Ebrahim5132@gmail.com

C# DataStructure EbrahimKarimi

چک کردن شماره شبا وارد شده جهت درست بودن فرمت و الگوریتم آن

C# System.String Reza Faghani

.Net Core use package.json files

C# .net core Hakan YILMAZ

if you Enter Some numbers in the Stack one number has inserted in Left Side and another one has inserted in Right Side.

C# DataStructure EbrahimKarimi

Check either IList object is null or empty.

C# IList Muhammad Shoaib Ijaz

Check if a string is match with given regular expression pattern

C# string Mohammed Reda AbdulAzim

Check if string is null or white spaces and return null alternate value

C# string Mohammed Reda Abdulazim

Allows you to chain .Add method

C# System.Collections.Generic.IList<T> ZBAGI

c# version of "Between" clause of sql query with including option

C# Between mousoft

Cache result of IEnumerable iteration. Similar to other implemetations with two advantages: 1 - Not flawed (Dispose of IEnumerator done by compiler) 2- Simplier

C# IEnumerable<T> beppemarazzi

Convert DataTable To List

C# DataTableToList Ravi Kumhar

ConvertToDateTimeNullable

C# ConvertToDateTimeNullable RK

Takes an array of nullable values and sums them up. Can be easily replaced with int?

C# double? kl00t

Insert an item to a sorted List

C# IList<T> Fons Sonnemans