ExtensionMethod.NET is a database of C# 3.0 and Visual Basic 2008 extension methods. It contains many user-rated extension methods that will expand your code library immediately.

Over 100 Extension Methods

Extension methods add functionality to existing classes and allow you to expand the .NET framework. This way your favorite functions integrate seamlessly into the framework. For more information about extension methods visit the C# 3.0 and Visual Basic 2008 MSDN Library pages.

We invite you to submit your favorite extension methods and download and use others.

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TOP 3 Extension Methods

OrderBy(string sortExpression)  Submitted by C.F.Meijers on 2008/4/25 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.Language C# Type System.Collections.Generic.IEnumerable<T> Downloads 388
Encrypt & Decrypt  Submitted by Mark de Rover on 2008/1/02 Encrypt and decrypt a string using the RSACryptoServiceProvider.Language C# Type System.String Downloads 312
Pivot  Submitted by Fons Sonnemans on 2009/1/21 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. Language C# Type System.Collections.Generic.IEnumerable<T> Downloads 255

Recently added

AddLeftIfDoesntExist  Submitted by Blake Pell on 2010/7/27 Adds a value onto the beginning of a string if it does not already exist there.Language VB Type System.String Downloads 0
AddRightIfDoesntExist  Submitted by Blake Pell on 2010/7/27 Adds a value onto the end of the string if it does not already exist there.Language VB Type System.String Downloads 0
FindControlByType  Submitted by Ryan Helms on 2010/7/18 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=309Language C# Type System.Control Downloads 0