Implement Logout Action

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ASP.NET

.NET

MVC

C#5.0

MVC5

I have a logging off function in my application. but it does not work correctly.
So i tried for last two days to do that. but i couldn't. \

This is the link to Action
------------------------------

<a href="@Url.Action("LogOut","Account")" class="cc-font-min">Log off</a></p>

This is the my Action for that
---------------------------------

public ActionResult LogOut()
{
    Session.Clear();
    WebSecurity.Logout();
    return RedirectToAction("Index", "Home");
}

And also this is the error that is follow me always. :)

To call this method, the "Membership.Provider" property must be an instance of "ExtendedMembershipProvider".

This is the part of my web.config file
------------------------------

   <appSettings>
  <add key="webpages:Version" value="2.0.0.0" />
  <add key="webpages:Enabled" value="false" />
  <add key="InboxPath" value="C:\test" />
  <add key="UploadPath" value="C:\uploaded" />
  <add key="UploadPathV" value="http://localhost/pn/uploaded"/>
  <add key="creditorFolders" value="test" />
  <add key="PreserveLoginUrl" value="true" />
  <add key="ClientValidationEnabled" value="true" />
  <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
</appSettings>
<system.web>
  <compilation debug="true" targetFramework="4.5" />
  <roleManager enabled="true" />
  <membership defaultProvider="SqlProvider" userIsOnlineTimeWindow="60">
    <providers>
      <clear />
      <add name="SqlProvider" type="System.Web.Security.SqlMembershipProvider" minRequiredPasswordLength="5" minRequiredNonalphanumericCharacters="0" connectionStringName="USCP" applicationName="CreditorPortal" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" requiresUniqueEmail="true" passwordFormat="Hashed" />
    </providers>
  </membership>
  <httpRuntime targetFramework="4.5" maxRequestLength="1048576" />
  <authentication mode="Forms">
    <forms loginUrl="~/Account/Login" timeout="2880" />
  </authentication>
  <pages>
    <namespaces>
      <add namespace="System.Web.Helpers" />
      <add namespace="System.Web.Mvc" />
      <add namespace="System.Web.Mvc.Ajax" />
      <add namespace="System.Web.Mvc.Html" />
      <add namespace="System.Web.Optimization" />
      <add namespace="System.Web.Routing" />
      <add namespace="System.Web.WebPages" />
    </namespaces>
  </pages>
</system.web>
<system.webServer>
  <validation validateIntegratedModeConfiguration="false" />
  <handlers>
    <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" />
    <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />
    <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
    <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
    <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
    <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
  </handlers>
  <security>
    <requestFiltering>
      <requestLimits maxAllowedContentLength="1048576000" />
    </requestFiltering>
  </security>
</system.webServer>