public DerivedClaim(DerivedClaim other, ClaimsIdentity subject)
     : base(other, subject)
 {
     _dataString = other._dataString;
     if (other._dataBytes != null)
     {
         _dataBytes = other._dataBytes.CloneByteArray();
     }
 }
 public DerivedClaim(DerivedClaim other)
     : this(other, (ClaimsIdentity)null)
 {
 }