/**
 * Copy constructor.  This will copy the state of the provided
 * message digest.
 */
 public MD5Digest(MD5Digest t)
     : base(t)
 {
     CopyIn(t);
 }
        private void CopyIn(MD5Digest t)
        {
            base.CopyIn(t);
            H1 = t.H1;
            H2 = t.H2;
            H3 = t.H3;
            H4 = t.H4;

            Array.Copy(t.X, 0, X, 0, t.X.Length);
            xOff = t.xOff;
        }