﻿<?xml version="1.0" encoding="utf-8"?><Type Name="Lookup&lt;TKey,TElement&gt;" FullName="System.Linq.Lookup&lt;TKey,TElement&gt;"><TypeSignature Language="C#" Value="public class Lookup&lt;TKey,TElement&gt; : System.Collections.Generic.IEnumerable&lt;System.Linq.IGrouping&lt;TKey,TElement&gt;&gt;, System.Linq.ILookup&lt;TKey,TElement&gt;" /><TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit Lookup`2&lt;TKey, TElement&gt; extends System.Object implements class System.Collections.Generic.IEnumerable`1&lt;class System.Linq.IGrouping`2&lt;!TKey, !TElement&gt;&gt;, class System.Collections.IEnumerable, class System.Linq.ILookup`2&lt;!TKey, !TElement&gt;" /><AssemblyInfo><AssemblyName>System.Core</AssemblyName><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><TypeParameters><TypeParameter Name="TKey" /><TypeParameter Name="TElement" /></TypeParameters><Base><BaseTypeName>System.Object</BaseTypeName></Base><Interfaces><Interface><InterfaceName>System.Collections.Generic.IEnumerable&lt;System.Linq.IGrouping&lt;TKey,TElement&gt;&gt;</InterfaceName></Interface><Interface><InterfaceName>System.Linq.ILookup&lt;TKey,TElement&gt;</InterfaceName></Interface></Interfaces><Docs><typeparam name="TKey">To be added.</typeparam><typeparam name="TElement">To be added.</typeparam><remarks><attribution license="cc4" from="Microsoft" modified="false" /><para>A <see cref="T:System.Linq.Lookup`2" /> resembles a <see cref="T:System.Collections.Generic.Dictionary`2" />. The difference is that a <see cref="T:System.Collections.Generic.Dictionary`2" /> maps keys to single values, whereas a <see cref="T:System.Linq.Lookup`2" /> maps keys to collections of values.</para><para>You can create an instance of a <see cref="T:System.Linq.Lookup`2" /> by calling <see cref="M:System.Linq.Enumerable.ToLookup``2(System.Collections.Generic.IEnumerable{``0},System.Func{``0,``1})" /> on an object that implements <see cref="T:System.Collections.Generic.IEnumerable`1" />.</para><block subset="none" type="note"><para>There is no public constructor to create a new instance of a <see cref="T:System.Linq.Lookup`2" />. Additionally, <see cref="T:System.Linq.Lookup`2" /> objects are immutable, that is, you cannot add or remove elements or keys from a <see cref="T:System.Linq.Lookup`2" /> object after it has been created.</para></block></remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Represents a collection of keys each mapped to one or more values.</para></summary></Docs><Members><Member MemberName="ApplyResultSelector&lt;TResult&gt;"><MemberSignature Language="C#" Value="public System.Collections.Generic.IEnumerable&lt;TResult&gt; ApplyResultSelector&lt;TResult&gt; (Func&lt;TKey,System.Collections.Generic.IEnumerable&lt;TElement&gt;,TResult&gt; resultSelector);" /><MemberSignature Language="ILAsm" Value=".method public hidebysig instance class System.Collections.Generic.IEnumerable`1&lt;!!TResult&gt; ApplyResultSelector&lt;TResult&gt;(class System.Func`3&lt;!TKey, class System.Collections.Generic.IEnumerable`1&lt;!TElement&gt;, !!TResult&gt; resultSelector) cil managed" /><MemberType>Method</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.Collections.Generic.IEnumerable&lt;TResult&gt;</ReturnType></ReturnValue><TypeParameters><TypeParameter Name="TResult" /></TypeParameters><Parameters><Parameter Name="resultSelector" Type="System.Func&lt;TKey,System.Collections.Generic.IEnumerable&lt;TElement&gt;,TResult&gt;" /></Parameters><Docs><typeparam name="TResult">To be added.</typeparam><param name="resultSelector">To be added.</param><summary>To be added.</summary><returns>To be added.</returns><remarks>To be added.</remarks></Docs></Member><Member MemberName="Contains"><MemberSignature Language="C#" Value="public bool Contains (TKey key);" /><MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance bool Contains(!TKey key) cil managed" /><MemberType>Method</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.Boolean</ReturnType></ReturnValue><Parameters><Parameter Name="key" Type="TKey" /></Parameters><Docs><param name="key">To be added.</param><summary>To be added.</summary><returns>To be added.</returns><remarks>To be added.</remarks></Docs></Member><Member MemberName="Count"><MemberSignature Language="C#" Value="public int Count { get; }" /><MemberSignature Language="ILAsm" Value=".property instance int32 Count" /><MemberType>Property</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.Int32</ReturnType></ReturnValue><Docs><value>To be added.</value><remarks><attribution license="cc4" from="Microsoft" modified="false" /><para>The value of the <see cref="P:System.Linq.Lookup`2.Count" /> property does not change because items cannot be added to or removed from a <see cref="T:System.Linq.Lookup`2" /> object after it has been created.</para></remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Gets the number of key/value collection pairs in the <see cref="T:System.Linq.Lookup`2" />.</para></summary></Docs></Member><Member MemberName="GetEnumerator"><MemberSignature Language="C#" Value="public System.Collections.Generic.IEnumerator&lt;System.Linq.IGrouping&lt;TKey,TElement&gt;&gt; GetEnumerator ();" /><MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Collections.Generic.IEnumerator`1&lt;class System.Linq.IGrouping`2&lt;!TKey, !TElement&gt;&gt; GetEnumerator() cil managed" /><MemberType>Method</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.Collections.Generic.IEnumerator&lt;System.Linq.IGrouping&lt;TKey,TElement&gt;&gt;</ReturnType></ReturnValue><Parameters /><Docs><remarks>To be added.</remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Returns a generic enumerator that iterates through the <see cref="T:System.Linq.Lookup`2" />.</para></summary><returns><attribution license="cc4" from="Microsoft" modified="false" /><para>An enumerator for the <see cref="T:System.Linq.Lookup`2" />.</para></returns></Docs></Member><Member MemberName="Item"><MemberSignature Language="C#" Value="public System.Collections.Generic.IEnumerable&lt;TElement&gt; this[TKey key] { get; }" /><MemberSignature Language="ILAsm" Value=".property instance class System.Collections.Generic.IEnumerable`1&lt;!TElement&gt; Item(!TKey)" /><MemberType>Property</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.Collections.Generic.IEnumerable&lt;TElement&gt;</ReturnType></ReturnValue><Parameters><Parameter Name="key" Type="TKey" /></Parameters><Docs><param name="key">To be added.</param><summary>To be added.</summary><value>To be added.</value><remarks>To be added.</remarks></Docs></Member><Member MemberName="System.Collections.IEnumerable.GetEnumerator"><MemberSignature Language="C#" Value="System.Collections.IEnumerator IEnumerable.GetEnumerator ();" /><MemberSignature Language="ILAsm" Value=".method hidebysig newslot virtual instance class System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() cil managed" /><MemberType>Method</MemberType><AssemblyInfo><AssemblyVersion>3.5.0.0</AssemblyVersion><AssemblyVersion>4.0.0.0</AssemblyVersion></AssemblyInfo><ReturnValue><ReturnType>System.Collections.IEnumerator</ReturnType></ReturnValue><Parameters /><Docs><remarks>To be added.</remarks><summary><attribution license="cc4" from="Microsoft" modified="false" /><para>Returns an enumerator that iterates through the <see cref="T:System.Linq.Lookup`2" />. This class cannot be inherited.</para></summary><returns><attribution license="cc4" from="Microsoft" modified="false" /><para>An enumerator for the <see cref="T:System.Linq.Lookup`2" />.</para></returns></Docs></Member></Members></Type>