title: How to add users in IIS Manager for an ASP.NET 4.0 application?
body: <p>I have installed an ASP.NET 4.0 Web forms application in IIS 7.5. If I set the application pool to <strong>DefaultAppPool</strong> (.NET Framework 2.0) I get the icons for <strong>Providers, .NET-Roles and .NET-Users</strong> displayed on the configuration page for the application in IIS Manager and I can manage users and roles within IIS. (I'm using Forms authentication.)</p>
  
  <p>But if I set the application pool to <strong>ASP.NET v4.0</strong> I get a problem: Double clicking on the icons for Users or Roles in IIS Manager throws an error telling me that I cannot use these features since the providers could not be determined as trusted. If I set in <strong>administration.config</strong> in the <strong>trustedProviders</strong> section <strong>allowUntrustedProviders="true"</strong> and double click again on one of the icons I get the error that the assembly <strong>System.Web, Version 4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</strong> could not be found. If I restart IIS Manager the icons disappear completely.</p>
  
  <p>.NET Framework 4.0 is definitely installed. So this is all quite confusing. I know that .NET 4 uses another GAC than the old one for .NET 2-3. Could it be possible that IIS Manager is not able to find the new GAC for .NET 4? Do I have to add perhaps some of the new 4.0 assemblies to <strong>administration.config</strong>? Is there another way to add users and roles instead of IIS?</p>
  
  <p>Thank you for help in advance!</p>