// ------- create RSACryptoServiceProvider instance and initialize with public key -----

                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

                RSAParameters RSAparams = new RSAParameters();

                RSAparams.Modulus = MODULUS;

                RSAparams.Exponent = E;

                RSAparams.D = D;

                RSAparams.P = P;

                RSAparams.Q = Q;

                RSAparams.DP = DP;

                RSAparams.DQ = DQ;

                RSAparams.InverseQ = IQ;

                RSA.ImportParameters(RSAparams);

                return RSA;

            }

            catch (Exception)

            {

                return null;

            }

            finally { binr.Close(); }

        }

        private static int GetIntegerSize(BinaryReader binr)

        {

            byte bt = 0;

            byte lowbyte = 0x00;

            byte highbyte = 0x00;

            int count = 0;

            bt = binr.ReadByte();