“Membership.Provider must be an instance of ExtendedMembershipProvider”

I’m writing a MVC4 Website using Microsoft Visual Studio express 2012 for web.
Whenever I run “Update-Database” in the Package Manager Console, the following Exception occurs:

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

This is my Seed method:

protected override void Seed(GNSystem.Models.DataContext context)
    {
        context.Forums.AddOrUpdate(
                        new Forum { ForumName = "Hello" },
                        new Forum { ForumName = "World" },
                        new Forum { ForumName = "!" }
                        );
        context.UserProfiles.Add(new UserAccount { UserName = "Gilad", EMail = "<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8afff9eff8caeff2ebe7fae6efa4e9e5e7">[email protected]</a>" });
        WebSecurity.CreateUserAndAccount("Gilad", "123456");
        WebSecurity.Login("Gilad", "123456");
        context.Threads.AddOrUpdate(
            new Thread { Subject = "FirstThread", Content = "Awesome Content", ForumID = 1, UserID = 1 },
            new Thread { Subject = "SecondThread", Content = "Awesome Content", ForumID = 1, UserID = 1 }
            );
    }

I searched for solutions and added the following directive in the Web.config file:

<add key="enableSimpleMembership" value="true" />

but the exception is thrown nonetheless.

What is the cause of this?
Edit 1:

    <?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)v11.0;Initial Catalog=aspnet-GNSystem-20120913165926;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnet-GNSystem-20120913165926.mdf" providerName="System.Data.SqlClient" />
  </connectionStrings>
  <appSettings>
    <add key="enableSimpleMembership" value="true" />
    <add key="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
    <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.NETFrameworkv4.0.30319aspnet_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.NETFramework64v4.0.30319aspnet_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>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
  </entityFramework>
</configuration>

Answers:

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Method 1

Before you can use WebSecurity.CreateUserAndAccount("Gilad", "123456"); SimpleMembership must be initialized. This is typically done on the AccountController with the [InitializeSimpleMembership] attribute, but since you’re trying to call these methods within your Seed, you will need to initialize it another way.

Method 2

protected override void Seed(eManager.Web.Infrastructure.DepartmentDb context)
{
  context.Departments.AddOrUpdate(d => d.Name,
              new Department() { Name = "Engineering" },
              new Department() { Name = "Sales" },
              new Department() { Name = "Shipping" },
              new Department() { Name = "Human Resources" });

  if (!Roles.RoleExists("Admin"))
  {
    Roles.CreateRole("Admin");
  }

  if (Membership.GetUser("wayne") == null)
  {
    Membership.CreateUser("wayne", "<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="e5b5a59696928a9781">[email protected]</a>");
    Roles.AddUserToRole("wayne", "Admin");
  }

Method 3

Please check that the Membership provider you are using in this application inherits from MembershipProvider or ExtendedMembershipProvider. Make sure that it is inheriting from ExtendedMembershipProvider class.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0