<?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>