public override void ImportParameters(RSAParameters parameters)
        {
            _rsa.Modulus  = parameters.Modulus;
            _rsa.Exponent = parameters.Exponent;
            _rsa.P        = parameters.P;
            _rsa.Q        = parameters.Q;
            _rsa.DP       = parameters.DP;
            _rsa.DQ       = parameters.DQ;
            _rsa.InverseQ = parameters.InverseQ;
            _rsa.D        = parameters.D;
            bool privateKey = false;

            if (parameters.D != null && parameters.D.Length > 0)
            {
                privateKey = true;
            }
            _rsa.BuildRawKey(privateKey);
        }