﻿<?xml version="1.0" encoding="utf-8"?><Type Name="ExtensionAttribute" FullName="System.Runtime.CompilerServices.ExtensionAttribute"><TypeSignature Language="C#" Value="public sealed class ExtensionAttribute : Attribute" /><AssemblyInfo><AssemblyName>System.Core</AssemblyName><AssemblyVersion>3.5.0.0</AssemblyVersion></AssemblyInfo><Base><BaseTypeName>System.Attribute</BaseTypeName></Base><Interfaces /><Attributes><Attribute><AttributeName>System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Method)</AttributeName></Attribute></Attributes><Docs><remarks><attribution license="cc4" from="Microsoft" modified="false" /><para>In Visual Basic, you should use this attribute to create an extension method. For more information, see <format type="text/html"><a href="b8020aae-374d-46a9-bcb7-8cc2390b93b6">Extension Methods (Visual Basic)</a></format>.</para><para>In C#, you do not need to use this attribute; you should use the <format type="text/html"><a href="d4f827fe-4710-410b-89b8-867dad44b8a3">this (C# Reference)</a></format> modifier for the first parameter to create an extension method. The compiler automatically emits ExtensionAttribute for extension methods. For more information, see <format type="text/html"><a href="175ce3ff-9bbf-4e64-8421-faeb81a0bb51">Extension Methods (C# Programming Guide)</a></format>.</para><para>If you are writing a compiler that supports extension methods, your compiler should emit this attribute on each extension method and on each class and assembly that contains one or more extension methods.</para></remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Indicates that a method is an extension method, or that a class or assembly contains extension methods.</para></summary></Docs><Members><Member MemberName=".ctor"><MemberSignature Language="C#" Value="public ExtensionAttribute ();" /><MemberType>Constructor</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion></AssemblyInfo><Parameters /><Docs><remarks>To be added.</remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Initializes a new instance of the <see cref="T:System.Runtime.CompilerServices.ExtensionAttribute" /> class. </para></summary></Docs></Member></Members></Type>