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 225
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 214
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 142

Recently added

ContainsAny  Submitted by Jason Jackson on 2009/11/19 Returns if a given string contains any of the characters provided in a params array of strings. Language C# Type System.String Downloads 0
WhereIf  Submitted by Phil Campbell on 2009/11/17 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/1V36G9Language C# Type System.Collections.Generic.IEnumerable<T> Downloads 0
GetRandomItem  Submitted by Ewerton Luis de Mattos on 2009/11/13 Return's a random item from a IList<T>Language C# Type System.Collections.Generic.IList<T> Downloads 0