Extension Methods from Fons Sonnemans

• Pivot

  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 Popular 23013 Views

• AddRange<T>()

  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 Popular 20946 Views

• ToObservableCollection<T>()

  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 Popular 16558 Views

• Storyboard.BeginAsync()

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

  C# Windows.UI.Xaml.Media.Animation.Storyboard Fons Sonnemans Popular 13054 Views

• IndexOf<T>()

  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 Popular 13000 Views

• IsPrime

  Returns true when a integer is a prime.

  C# System.Int32 Fons Sonnemans Popular 11635 Views

• SetCookie(), GetCookie(), DeleteCookie()

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

  C# System.Windows.Browser.HtmlDocument Fons Sonnemans Popular 10661 Views

• ToString

  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 Popular 10083 Views

• GetValueOrDefault<T> for DbDataReader

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

  C# System.Data.Common.DbDataReader Fons Sonnemans Popular 7955 Views

• Popup.ShowAsync()

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

  C# Windows.UI.Xaml.Controls.Primitives.Popup Fons Sonnemans 6794 Views

• Append() and Prepend()

  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 6750 Views

• ToColor

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

  C# System.String Fons Sonnemans 6320 Views

• SetInputScope

  Set the InputScope of TextBox on a Windows 7 Phone.

  C# System.Windows.Controls.TextBox Fons Sonnemans 6205 Views

• FirstIndex() and LastIndex()

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

  C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans 6099 Views

• First(), Last(), Any()

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

  C# System.Collections.Generic.IList<T> Fons Sonnemans 6082 Views

• GetPermutations

  GetPermutations

  C# System.Collection.Generic.IEnumerable<T> Fons Sonnemans 6061 Views

• Chooser.ShowAsync()

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

  C# Microsoft.Phone.Tasks.ChooserBase<T> Fons Sonnemans 5649 Views

• WriteToConsole

  Write all elements in the Enumeration to the Console

  C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans 5551 Views

• FirstOrNothing

  Returns the first element of a sequence, or a nullable value which has no value if no element is found.

  VB System.Collections.Generic.IEnumerable<T> Fons Sonnemans 5274 Views

• FindMin() and FindMax()

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

  C# System.Collections.Generic.IEnumerable<T> Fons Sonnemans 5240 Views

• SetInitialFocus

  Set the initial focus for a Silverlight ChildWindow.

  C# System.Windows.Controls.ChildWindow Fons Sonnemans 5077 Views

• SplitNext

  Split the next part of this span with the given separator

  C# ReadOnlySpan Fons Sonnemans 4660 Views

• ToList(capacity)

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

  csharp ienumerable-t Fons Sonnemans 4437 Views

• InsertSorted

  Insert an item to a sorted List

  C# IList<T> Fons Sonnemans 4337 Views

• Right

  Returns a string containing a specified number of characters from the right side of a string

  VB String Fons Sonnemans 3786 Views

• FillSpan

  Fill any Span using an IEnumerable. Returns the number of items which are placed in the Span.

  csharp ienumerable-t Fons Sonnemans 3575 Views

• All() and Any() on Array and List<T>

  Faster implementations of the LINQ All() and Any() methods for Array and List<T>. This solution uses less memory allocations and is just faster. Temporary solution until this PR is accepted https://github.com/dotnet/runtime/pull/1832

  csharp Array and List<T> Fons Sonnemans 3175 Views

• ForEachRef

  Performs the specified action on each ValueType in the List<T> without copying it.

  csharp System.Collections.Generic.List<T> Fons Sonnemans 2896 Views

• AnyAndAll

  Determines whether a sequence contains any elements and whether all elements of a sequence satisfy a condition. The normal 'All' method returns true when the sequence is empty.

  csharp System.Collections.Generic.IEnumerable<T> Fons Sonnemans 2489 Views

• EnumerateWithIndex<T>()

  Enumerate an IEnumerable<T> source and getting the Index and the Item returned in a ValueTuple.

  csharp System.Collections.Generic.IEnumerable<T> Fons Sonnemans 2344 Views

• Fluent DateOnly Extensions

  A fluent way to create DateOnly values.

  csharp System.Int32 Fons Sonnemans 1926 Views

• Dictionary<K,V>.GetValueOrDefault()

  If you attempt to get a value from a dictionary using a key that doesn't exist, it throws a KeyNotFoundException. But this extension method to return a default value when the key doesn't exist. Also supports an overload with a Lazy initialization of the fallback value.

  csharp dictionary-tkey-tvalue Fons Sonnemans 1617 Views

• SkipFrom

  Bypasses a specified number of elements in a sequence from a given start position

  csharp ienumerable-t Fons Sonnemans 672 Views