GetAttributes

using System;
using System.Collections.Generic;
using System.Reflection;

/// <summary>
/// Extension methods for dealing with an assembly
/// </summary>
public static class AssemblyExtensions
{
	/// <summary>
	/// Gets the attributes from an assembly.
	/// </summary>
	/// <typeparam name="T">The type of the custom attribute to find.</typeparam>
	/// <param name="callingAssembly">The calling assembly to search.</param>
	/// <returns>An enumeration of attributes of type T that were found.</returns>
	public static IEnumerable<T> GetAttributes<T>(this Assembly callingAssembly)
		where T : Attribute
	{
		// Try to find the configuration attribute for the default logger if it exists
		object[] configAttributes = Attribute.GetCustomAttributes(callingAssembly,
			typeof(T), false);

		if (configAttributes != null)
		{
			foreach (T attribute in configAttributes)
			{
				yield return attribute;
			}
		}
	}
}

var attributes = Assembly.GetExecutingAssembly().GetAttributes<InstallPerformanceCounterAttribute>();