SessionStateUtility.xml

<Type Name="SessionStateUtility" FullName="System.Web.SessionState.SessionStateUtility">
  <TypeSignature Language="C#" Value="public static class SessionStateUtility" />
  <TypeSignature Language="ILAsm" Value=".class public auto ansi abstract sealed beforefieldinit SessionStateUtility extends System.Object" />
  <TypeSignature Language="DocId" Value="T:System.Web.SessionState.SessionStateUtility" />
  <TypeSignature Language="VB.NET" Value="Public Class SessionStateUtility" />
  <TypeSignature Language="F#" Value="type SessionStateUtility = class" />
  <TypeSignature Language="C++ CLI" Value="public ref class SessionStateUtility abstract sealed" />
  <AssemblyInfo>
    <AssemblyName>System.Web</AssemblyName>
    <AssemblyVersion>2.0.0.0</AssemblyVersion>
    <AssemblyVersion>4.0.0.0</AssemblyVersion>
  </AssemblyInfo>
  <Base>
    <BaseTypeName>System.Object</BaseTypeName>
  </Base>
  <Interfaces />
  <Docs>
    <summary>Provides helper methods used by session-state modules and session-state store providers to manage session information for an ASP.NET application. This class cannot be inherited.</summary>
    <remarks>
      <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Web.SessionState.SessionStateUtility> class provides static helper methods that are used by a session-state module or a session-state store provider. Application developers will not need to call these methods from their code.

 The following table describes the ways the session-state module and session-state store provider use the methods.

|Method|Use|
|------------|---------|
|<xref:System.Web.SessionState.SessionStateUtility.GetHttpSessionStateFromContext%2A> method|Can be used by custom session-state modules to either retrieve session information for an existing session or create session information for a new session.|
|<xref:System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext%2A> method|Called by the session-state module to add the session data to the current <xref:System.Web.HttpContext> and make it available to application code through the <xref:System.Web.HttpContext.Session%2A> property.|
|<xref:System.Web.SessionState.SessionStateUtility.RemoveHttpSessionStateFromContext%2A> method|Called by the session-state module during the <xref:System.Web.HttpApplication.ReleaseRequestState> or <xref:System.Web.HttpApplication.EndRequest> events at the end of a request, to clear session data from the current <xref:System.Web.HttpContext>.|
|<xref:System.Web.SessionState.SessionStateUtility.GetSessionStaticObjects%2A> method|Called by the session-state module to get a reference to the <xref:System.Web.SessionState.HttpSessionState.StaticObjects%2A> collection based on objects defined in the Global.asax file. The <xref:System.Web.HttpStaticObjectsCollection> collection returned is included with the session data added to the current <xref:System.Web.HttpContext>.|

 Session data is passed to and retrieved from the current <xref:System.Web.HttpContext> as an <xref:System.Web.SessionState.HttpSessionStateContainer> object or any valid implementation of the <xref:System.Web.SessionState.IHttpSessionState> interface.

 For information about implementing a session-state store provider, see [Implementing a Session-State Store Provider](https://docs.microsoft.com/previous-versions/aspnet/ms178587(v=vs.100)).



## Examples
 The following code example shows a custom session-state module implementation that stores session information in memory using a <xref:System.Collections.Hashtable>. The module uses the <xref:System.Web.SessionState.SessionStateUtility> class to reference the current <xref:System.Web.HttpContext> and <xref:System.Web.SessionState.SessionIDManager>, retrieve the current <xref:System.Web.HttpStaticObjectsCollection>, and raise the **Session_OnEnd** event defined in the Global.asax file for the ASP.NET application. This application does not prevent simultaneous Web requests from using the same session identifier.

 :::code language="csharp" source="~/snippets/csharp/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/CS/mysessionstatemodule.cs" id="Snippet1":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/VB/mysessionstatemodule.vb" id="Snippet1":::

 To use this custom session-state module in an ASP.NET application, you can replace the existing <xref:System.Web.SessionState.SessionStateModule> reference in the Web.config file, as shown in the following example.

```
<configuration>
  <system.web>
    <httpModules>
      <remove name="Session" />
      <add name="Session"
      type="Samples.AspNet.SessionState.MySessionStateModule" />
    </httpModules>
  </system.web>
</configuration>
```

 ]]></format>
    </remarks>
    <related type="Article" href="https://docs.microsoft.com/previous-versions/aspnet/ms178581(v=vs.100)">ASP.NET Session State Overview</related>
  </Docs>
  <Members>
    <Member MemberName="AddHttpSessionStateToContext">
      <MemberSignature Language="C#" Value="public static void AddHttpSessionStateToContext (System.Web.HttpContext context, System.Web.SessionState.IHttpSessionState container);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig void AddHttpSessionStateToContext(class System.Web.HttpContext context, class System.Web.SessionState.IHttpSessionState container) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext(System.Web.HttpContext,System.Web.SessionState.IHttpSessionState)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Sub AddHttpSessionStateToContext (context As HttpContext, container As IHttpSessionState)" />
      <MemberSignature Language="F#" Value="static member AddHttpSessionStateToContext : System.Web.HttpContext * System.Web.SessionState.IHttpSessionState -&gt; unit" Usage="System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext (context, container)" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static void AddHttpSessionStateToContext(System::Web::HttpContext ^ context, System::Web::SessionState::IHttpSessionState ^ container);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="context" Type="System.Web.HttpContext" />
        <Parameter Name="container" Type="System.Web.SessionState.IHttpSessionState" />
      </Parameters>
      <Docs>
        <param name="context">The <see cref="T:System.Web.HttpContext" /> object to which to add the <see cref="T:System.Web.SessionState.HttpSessionState" /> object.</param>
        <param name="container">The <see cref="T:System.Web.SessionState.IHttpSessionState" /> implementation instance to add to the specified HTTP context.</param>
        <summary>Applies the session data to the context for the current request.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext%2A> method is used by a session-state module to apply session data to the current request. This occurs during the <xref:System.Web.HttpApplication.AcquireRequestState> event at the beginning of a request. Session data for the current request is either retrieved for an existing session or created for a new session. The session data is then encapsulated in an <xref:System.Web.SessionState.IHttpSessionState> implementation instance, which is passed to the <xref:System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext%2A> method along with the current <xref:System.Web.HttpContext>. The supplied session data is then made available to application code through the <xref:System.Web.HttpContext.Session%2A> property of the current context.



## Examples
 The following code example shows the handler for the <xref:System.Web.HttpApplication.AcquireRequestState> event in a custom session-state module. The custom module retrieves existing session information or creates new session information and uses the <xref:System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext%2A> method to add it to the <xref:System.Web.HttpContext> of the current request. This code example is part of a larger example provided for the <xref:System.Web.SessionState.SessionStateUtility> class.

 :::code language="csharp" source="~/snippets/csharp/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/CS/mysessionstatemodule.cs" id="Snippet4":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/VB/mysessionstatemodule.vb" id="Snippet4":::

 ]]></format>
        </remarks>
        <exception cref="T:System.Web.HttpException">An <see cref="T:System.Web.SessionState.HttpSessionState" /> object for the current session has already been added to the specified <paramref name="context" />.</exception>
      </Docs>
    </Member>
    <Member MemberName="GetHttpSessionStateFromContext">
      <MemberSignature Language="C#" Value="public static System.Web.SessionState.IHttpSessionState GetHttpSessionStateFromContext (System.Web.HttpContext context);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig class System.Web.SessionState.IHttpSessionState GetHttpSessionStateFromContext(class System.Web.HttpContext context) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.GetHttpSessionStateFromContext(System.Web.HttpContext)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Function GetHttpSessionStateFromContext (context As HttpContext) As IHttpSessionState" />
      <MemberSignature Language="F#" Value="static member GetHttpSessionStateFromContext : System.Web.HttpContext -&gt; System.Web.SessionState.IHttpSessionState" Usage="System.Web.SessionState.SessionStateUtility.GetHttpSessionStateFromContext context" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static System::Web::SessionState::IHttpSessionState ^ GetHttpSessionStateFromContext(System::Web::HttpContext ^ context);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Web.SessionState.IHttpSessionState</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="context" Type="System.Web.HttpContext" />
      </Parameters>
      <Docs>
        <param name="context">The <see cref="T:System.Web.HttpContext" /> from which to retrieve session data.</param>
        <summary>Retrieves session data from the context for the current request.</summary>
        <returns>An <see cref="T:System.Web.SessionState.IHttpSessionState" /> implementation instance populated with session data from the current request.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Web.SessionState.SessionStateUtility.GetHttpSessionStateFromContext%2A> method can be used by a session-state module to retrieve session data from the current request. This occurs during the <xref:System.Web.HttpApplication.ReleaseRequestState> event at the end of a request. The returned session data can then be written to the session data store. If the session has been abandoned, the session data can be removed from the data store and <xref:System.Web.HttpContext>, and the **Session_OnEnd** event can be executed.



## Examples
 The following code example shows the handler for the <xref:System.Web.HttpApplication.ReleaseRequestState> event in a custom session-state module. The module retrieves session data from the <xref:System.Web.HttpContext> for the current request using the <xref:System.Web.SessionState.SessionStateUtility.GetHttpSessionStateFromContext%2A> method. This code example is part of a larger example provided for the <xref:System.Web.SessionState.SessionStateUtility> class.

 :::code language="csharp" source="~/snippets/csharp/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/CS/mysessionstatemodule.cs" id="Snippet5":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/VB/mysessionstatemodule.vb" id="Snippet5":::

 ]]></format>
        </remarks>
        <block subset="none" type="overrides">
          <para>You can use the <see cref="M:System.Web.SessionState.SessionStateUtility.RemoveHttpSessionStateFromContext(System.Web.HttpContext)" /> method to remove session data from the internal store, and the <see cref="M:System.Web.SessionState.SessionStateUtility.RaiseSessionEnd(System.Web.SessionState.IHttpSessionState,System.Object,System.EventArgs)" /> method to raise the <see langword="Session_OnEnd" /> event.</para>
        </block>
      </Docs>
    </Member>
    <Member MemberName="GetSessionStaticObjects">
      <MemberSignature Language="C#" Value="public static System.Web.HttpStaticObjectsCollection GetSessionStaticObjects (System.Web.HttpContext context);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig class System.Web.HttpStaticObjectsCollection GetSessionStaticObjects(class System.Web.HttpContext context) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.GetSessionStaticObjects(System.Web.HttpContext)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Function GetSessionStaticObjects (context As HttpContext) As HttpStaticObjectsCollection" />
      <MemberSignature Language="F#" Value="static member GetSessionStaticObjects : System.Web.HttpContext -&gt; System.Web.HttpStaticObjectsCollection" Usage="System.Web.SessionState.SessionStateUtility.GetSessionStaticObjects context" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static System::Web::HttpStaticObjectsCollection ^ GetSessionStaticObjects(System::Web::HttpContext ^ context);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Web.HttpStaticObjectsCollection</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="context" Type="System.Web.HttpContext" />
      </Parameters>
      <Docs>
        <param name="context">The <see cref="T:System.Web.HttpContext" /> from which to get the static objects collection.</param>
        <summary>Gets a reference to the static objects collection for the specified context.</summary>
        <returns>An <see cref="T:System.Web.HttpStaticObjectsCollection" /> collection populated with the <see cref="P:System.Web.SessionState.HttpSessionState.StaticObjects" /> property value for the specified <see cref="T:System.Web.HttpContext" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Web.SessionState.SessionStateUtility.GetSessionStaticObjects%2A> method is used to retrieve the collection of static objects defined in the Global.asax file for the ASP.NET application. A session-state module implementation will supply the returned <xref:System.Web.HttpStaticObjectsCollection> collection to the <xref:System.Web.SessionState.IHttpSessionState> implementation instance that is added to the current context using the <xref:System.Web.SessionState.SessionStateUtility.AddHttpSessionStateToContext%2A> method.

 A <xref:System.Web.SessionState.SessionStateStoreProviderBase> can also use the <xref:System.Web.SessionState.SessionStateUtility.GetSessionStaticObjects%2A> method when creating a <xref:System.Web.SessionState.SessionStateStoreData> object.



## Examples
 The following code example shows the handler for the <xref:System.Web.HttpApplication.AcquireRequestState> event in a custom session-state module. The module retrieves existing session information or creates new session information, including the <xref:System.Web.HttpStaticObjectsCollection> collection returned from the <xref:System.Web.SessionState.SessionStateUtility.GetSessionStaticObjects%2A> method, and adds it to the <xref:System.Web.HttpContext> of the current request. This code example is part of a larger example provided for the <xref:System.Web.SessionState.SessionStateUtility> class.

 :::code language="csharp" source="~/snippets/csharp/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/CS/mysessionstatemodule.cs" id="Snippet4":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/VB/mysessionstatemodule.vb" id="Snippet4":::

 ]]></format>
        </remarks>
      </Docs>
    </Member>
    <Member MemberName="IsSessionStateReadOnly">
      <MemberSignature Language="C#" Value="public static bool IsSessionStateReadOnly (System.Web.HttpContext context);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig bool IsSessionStateReadOnly(class System.Web.HttpContext context) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.IsSessionStateReadOnly(System.Web.HttpContext)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Function IsSessionStateReadOnly (context As HttpContext) As Boolean" />
      <MemberSignature Language="F#" Value="static member IsSessionStateReadOnly : System.Web.HttpContext -&gt; bool" Usage="System.Web.SessionState.SessionStateUtility.IsSessionStateReadOnly context" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static bool IsSessionStateReadOnly(System::Web::HttpContext ^ context);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="context" Type="System.Web.HttpContext" Index="0" FrameworkAlternate="netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1" />
      </Parameters>
      <Docs>
        <param name="context">Specifies the <see cref="T:System.Web.HttpContext" /> to check.</param>
        <summary>Gets a value which indicates whether the session state is read-only for the specified <see cref="T:System.Web.HttpContext" />.</summary>
        <returns>
          <see langword="true" /> if the session state is read-only; otherwise, <see langword="false" />.</returns>
        <remarks>To be added.</remarks>
      </Docs>
    </Member>
    <Member MemberName="IsSessionStateRequired">
      <MemberSignature Language="C#" Value="public static bool IsSessionStateRequired (System.Web.HttpContext context);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig bool IsSessionStateRequired(class System.Web.HttpContext context) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.IsSessionStateRequired(System.Web.HttpContext)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Function IsSessionStateRequired (context As HttpContext) As Boolean" />
      <MemberSignature Language="F#" Value="static member IsSessionStateRequired : System.Web.HttpContext -&gt; bool" Usage="System.Web.SessionState.SessionStateUtility.IsSessionStateRequired context" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static bool IsSessionStateRequired(System::Web::HttpContext ^ context);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="context" Type="System.Web.HttpContext" Index="0" FrameworkAlternate="netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1" />
      </Parameters>
      <Docs>
        <param name="context">Specifies the <see cref="T:System.Web.HttpContext" /> to check.</param>
        <summary>Gets a value which indicates whether the session state is required for the specified <see cref="T:System.Web.HttpContext" />.</summary>
        <returns>
          <see langword="true" /> if the session state is required; otherwise, <see langword="false" />.</returns>
        <remarks>To be added.</remarks>
      </Docs>
    </Member>
    <Member MemberName="RaiseSessionEnd">
      <MemberSignature Language="C#" Value="public static void RaiseSessionEnd (System.Web.SessionState.IHttpSessionState session, object eventSource, EventArgs eventArgs);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig void RaiseSessionEnd(class System.Web.SessionState.IHttpSessionState session, object eventSource, class System.EventArgs eventArgs) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.RaiseSessionEnd(System.Web.SessionState.IHttpSessionState,System.Object,System.EventArgs)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Sub RaiseSessionEnd (session As IHttpSessionState, eventSource As Object, eventArgs As EventArgs)" />
      <MemberSignature Language="F#" Value="static member RaiseSessionEnd : System.Web.SessionState.IHttpSessionState * obj * EventArgs -&gt; unit" Usage="System.Web.SessionState.SessionStateUtility.RaiseSessionEnd (session, eventSource, eventArgs)" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static void RaiseSessionEnd(System::Web::SessionState::IHttpSessionState ^ session, System::Object ^ eventSource, EventArgs ^ eventArgs);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="session" Type="System.Web.SessionState.IHttpSessionState" />
        <Parameter Name="eventSource" Type="System.Object" />
        <Parameter Name="eventArgs" Type="System.EventArgs" />
      </Parameters>
      <Docs>
        <param name="session">The <see cref="T:System.Web.SessionState.IHttpSessionState" /> implementation instance for the session that has ended.</param>
        <param name="eventSource">The event source object to supply to the <see langword="Session_OnEnd" /> event.</param>
        <param name="eventArgs">The <see cref="T:System.EventArgs" /> object to supply to the <see langword="Session_OnEnd" /> event.</param>
        <summary>Executes the **Session_OnEnd** event defined in the Global.asax file for the ASP.NET application.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Web.SessionState.SessionStateUtility.RaiseSessionEnd%2A> method is used by a session-state module to execute the **Session_OnEnd** event defined in the Global.asax file for an ASP.NET application. A session-state module will call the <xref:System.Web.SessionState.SessionStateUtility.RaiseSessionEnd%2A> method when a session has been abandoned, or if the session expires.



## Examples
 The following code example shows the handler for the <xref:System.Web.HttpApplication.ReleaseRequestState> event in a custom session-state module. If the session has been abandoned, the module executes the **Session_OnEnd** event defined in the Global.asax file for the application using the <xref:System.Web.SessionState.SessionStateUtility.RaiseSessionEnd%2A> method. This code example is part of a larger example provided for the <xref:System.Web.SessionState.SessionStateUtility> class.

 :::code language="csharp" source="~/snippets/csharp/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/CS/mysessionstatemodule.cs" id="Snippet5":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/VB/mysessionstatemodule.vb" id="Snippet5":::

 ]]></format>
        </remarks>
      </Docs>
    </Member>
    <Member MemberName="RemoveHttpSessionStateFromContext">
      <MemberSignature Language="C#" Value="public static void RemoveHttpSessionStateFromContext (System.Web.HttpContext context);" />
      <MemberSignature Language="ILAsm" Value=".method public static hidebysig void RemoveHttpSessionStateFromContext(class System.Web.HttpContext context) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Web.SessionState.SessionStateUtility.RemoveHttpSessionStateFromContext(System.Web.HttpContext)" />
      <MemberSignature Language="VB.NET" Value="Public Shared Sub RemoveHttpSessionStateFromContext (context As HttpContext)" />
      <MemberSignature Language="F#" Value="static member RemoveHttpSessionStateFromContext : System.Web.HttpContext -&gt; unit" Usage="System.Web.SessionState.SessionStateUtility.RemoveHttpSessionStateFromContext context" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static void RemoveHttpSessionStateFromContext(System::Web::HttpContext ^ context);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
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      <Attributes>
        <Attribute FrameworkAlternate="netframework-4.0">
          <AttributeName Language="C#">[System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
          <AttributeName Language="F#">[&lt;System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")&gt;]</AttributeName>
        </Attribute>
      </Attributes>
      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="context" Type="System.Web.HttpContext" />
      </Parameters>
      <Docs>
        <param name="context">The <see cref="T:System.Web.HttpContext" /> from which to remove session data.</param>
        <summary>Removes session data from the specified context.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 The <xref:System.Web.SessionState.SessionStateUtility.RemoveHttpSessionStateFromContext%2A> method clears session data from the specified <xref:System.Web.HttpContext>. A session-state module will call the <xref:System.Web.SessionState.SessionStateUtility.RemoveHttpSessionStateFromContext%2A> method in the handler for the <xref:System.Web.HttpApplication.ReleaseRequestState> event.



## Examples
 The following code example shows the handler for the <xref:System.Web.HttpApplication.ReleaseRequestState> event in a custom session-state module. The event handler removes session data from the current <xref:System.Web.HttpContext>. This code example is part of a larger example provided for the <xref:System.Web.SessionState.SessionStateUtility> class.

 :::code language="csharp" source="~/snippets/csharp/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/CS/mysessionstatemodule.cs" id="Snippet5":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_WebNet/System.Web.SessionState.SessionStateUtility/VB/mysessionstatemodule.vb" id="Snippet5":::

 ]]></format>
        </remarks>
      </Docs>
    </Member>
    <Member MemberName="SerializationSurrogateSelector">
      <MemberSignature Language="C#" Value="public static System.Runtime.Serialization.ISurrogateSelector SerializationSurrogateSelector { get; set; }" />
      <MemberSignature Language="ILAsm" Value=".property class System.Runtime.Serialization.ISurrogateSelector SerializationSurrogateSelector" />
      <MemberSignature Language="DocId" Value="P:System.Web.SessionState.SessionStateUtility.SerializationSurrogateSelector" />
      <MemberSignature Language="VB.NET" Value="Public Shared Property SerializationSurrogateSelector As ISurrogateSelector" />
      <MemberSignature Language="F#" Value="static member SerializationSurrogateSelector : System.Runtime.Serialization.ISurrogateSelector with get, set" Usage="System.Web.SessionState.SessionStateUtility.SerializationSurrogateSelector" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; static property System::Runtime::Serialization::ISurrogateSelector ^ SerializationSurrogateSelector { System::Runtime::Serialization::ISurrogateSelector ^ get(); void set(System::Runtime::Serialization::ISurrogateSelector ^ value); };" />
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      <AssemblyInfo>
        <AssemblyName>System.Web</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Runtime.Serialization.ISurrogateSelector</ReturnType>
      </ReturnValue>
      <Docs>
        <summary>Gets or sets a serialization surrogate selector that is used for session serialization customization.</summary>
        <value>A serialization surrogate selector.</value>
        <remarks>To be added.</remarks>
      </Docs>
    </Member>
  </Members>
</Type>