System.Net.Security.SecureChannel.MakeEx C# (CSharp) Method

        private static X509Certificate2 MakeEx(X509Certificate certificate)
        {
            Debug.Assert(certificate != null, "certificate != null");

            if (certificate.GetType() == typeof(X509Certificate2))
            {
                return (X509Certificate2)certificate;
            }

            X509Certificate2 certificateEx = null;
            try
            {
                if (certificate.Handle != IntPtr.Zero)
                {
                    certificateEx = new X509Certificate2(certificate.Handle);
                }
            }
            catch (SecurityException) { }
            catch (CryptographicException) { }

            return certificateEx;
        }