Create a new text file named method.snippet and paste the following:

<?xml version="1.0" encoding="utf-8" ?>

<CodeSnippets  xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">

    <CodeSnippet Format="1.0.0">

       <Header>

           <Title>xmethod</Title>

           <Shortcut>xmethod</Shortcut>

           <Description>Code snippet for method extension</Description>

           <Author>Gary Sun</Author>

           <SnippetTypes>

               <SnippetType>Expansion</SnippetType>

           </SnippetTypes>

       </Header>

       <Snippet>

           <Declarations>

               <Literal>

                   <ID>methodname</ID>

                   <ToolTip>Method name</ToolTip>

                   <Function>MethodName()</Function>

                   <Default>MethodNamePlaceholder</Default>

               </Literal>

               <Literal>

                   <ID>methodtype</ID>

                   <ToolTip>Method type</ToolTip>

                   <Function>MethodType()</Function>

                   <Default>void</Default>

               </Literal>

               <Literal>

                   <ID>classtype</ID>

                   <ToolTip>Class type</ToolTip>

                   <Function>ClassType()</Function>

                   <Default>ClassPlaceholder</Default>

               </Literal>

               <Literal>

                   <ID>argname</ID>

                   <ToolTip>Argument name</ToolTip>

                   <Function>Argumentname()</Function>

                   <Default>ArgPlaceholder</Default>

               </Literal>

           </Declarations>

           <Code Language="csharp"><![CDATA[public static $methodtype$ $methodname$ (this $classtype$ $argname$ )

    {

       $end$

    }]]>

           </Code>

       </Snippet>

    </CodeSnippet>

</CodeSnippets>

Copy your file into the snippets folder in Windows Explorer:

• Visual Studio 2010: C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC#\Snippets\1033\Visual C#

• Visual Studio 2008: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC#\Snippets\1033\Visual C#

Once you save your file the snippets are automatically loaded, so you can now open visual studio and use it.