This System.Security.Principal.IIdentity instance provides information to the FormsAuthenticationModule about the current user identity. This information consists of the username (Name), the type of authentication (AuthenticationType), which will always be "Forms," and the corresponding ticket object (Ticket)
public sealed class FormsIdentity : System.Security.Principal.IIdentity { // Public Constructors public FormsIdentity(FormsAuthenticationTicket ticket); // Public Instance Properties public string AuthenticationType{get; } // implements System.Security.Principal.IIdentity public bool IsAuthenticated{get; } // implements System.Security.Principal.IIdentity public string Name{get; } // implements System.Security.Principal.IIdentity public FormsAuthenticationTicket Ticket{get; } }