/// <inheritdoc/>
        public ICryptographicKey ImportKeyPair(byte[] keyBlob, CryptographicPrivateKeyBlobType blobType = CryptographicPrivateKeyBlobType.Pkcs8RawPrivateKeyInfo)
        {
            Requires.NotNull(keyBlob, "keyBlob");

            var parameters = KeyFormatter.GetFormatter(blobType)
                             .Read(keyBlob)
                             .ComputeFullPrivateKeyData();

            if (!CapiKeyFormatter.IsCapiCompatible(parameters))
            {
                // Try to make it CAPI compatible since it's faster on desktop,
                // and the only thing that could possibly work on wp8.
                RSAParameters adjustedParameters = KeyFormatter.NegotiateSizes(parameters);
                if (CapiKeyFormatter.IsCapiCompatible(adjustedParameters))
                {
                    parameters = adjustedParameters;
                }
            }

            Platform.RSA rsa;
            if (CapiKeyFormatter.IsCapiCompatible(parameters))
            {
                rsa = new Platform.RSACryptoServiceProvider();
            }
            else
            {
#if DESKTOP
                rsa = new RSAManaged();
#else
                // Throw the exception explaining the problem.
                CapiKeyFormatter.VerifyCapiCompatibleParameters(parameters);

                // Make it obvious to the compiler that the buck stops here.
                // er... on the line above.
                throw new NotSupportedException();
#endif
            }

            rsa.ImportParameters(KeyFormatter.ToPlatformParameters(parameters));
            return(new RsaCryptographicKey(rsa, this.algorithm));
        }