title: Where is Microsoft.Sharepoint.IdentityModel.dll
body: <p>I am trying to use the <strong>SPFederationAuthenticationModule</strong> class in my SharePoint Foundation 2010 project. \I cannot find <strong>Microsoft.Sharepoint.IdentityModel.dll</strong> file. There is not one in <strong>c:\windows\assembly</strong>. Help me!</p>