public MigrationUserIdParameter(string identity)
 {
     if (string.IsNullOrEmpty(identity))
     {
         throw new ArgumentNullException("identity");
     }
     this.MigrationUserId = MigrationUserIdParameter.ParseMigrationUserId(identity);
     this.RawIdentity     = identity;
 }
 public MigrationUserIdParameter(INamedIdentity namedIdentity)
 {
     if (namedIdentity == null)
     {
         throw new ArgumentNullException("namedIdentity");
     }
     this.MigrationUserId = MigrationUserIdParameter.ParseMigrationUserId(namedIdentity.Identity);
     this.RawIdentity     = namedIdentity.DisplayName;
 }