gistfile1.cs

   public interface IFormsAuthWrapper
    {
        FormsAuthenticationTicket Decrypt(string value);
        string GetAuthToken(string username, bool persist);
    }
    
       public class FormsAuthWrapper : IFormsAuthWrapper
    {
        private const int SessionTimeout = 300;

        public FormsAuthenticationTicket Decrypt(string value)
        {
            return FormsAuthentication.Decrypt(value);
        }

        public string GetAuthToken(string username, bool persist)
        {
            var ticket = new FormsAuthenticationTicket(username, persist, SessionTimeout);
            return FormsAuthentication.Encrypt(ticket);
        }
    }