public void Constructor_XmlDocument()
        {
            XmlDecryption encryptedXml = new XmlDecryption(null);

            Assert.Equal(DefaultEncoding, encryptedXml.GetEncoding());
            Assert.Equal(DefaultCipherMode, encryptedXml.GetMode());
            Assert.Equal(DefaultPaddingMode, encryptedXml.GetPadding());
            Assert.Equal(DefaultRecipient, encryptedXml.Recipient);
            Assert.Equal(DefaultXmlResolver, encryptedXml.GetResolver());
            Assert.Equal(DefaultXmlDSigSearchDepth, encryptedXml.GetXmlDSigSearchDepth());
        }