public void IsSupportedAlgorithm()
        {
            X509AsymmetricSecurityKey key = new X509AsymmetricSecurityKey(cert);

            Assert.IsTrue(key.IsSupportedAlgorithm(EncryptedXml.XmlEncRSA15Url), "#1");
            Assert.IsFalse(key.IsSupportedAlgorithm(SignedXml.XmlDsigDSAUrl), "#2");
            Assert.IsFalse(key.IsSupportedAlgorithm(SignedXml.XmlDsigHMACSHA1Url), "#3");
        }
        // huh?
        //[ExpectedException (typeof (ArgumentNullException))]
        public void IsSupportedAlgorithmNullAlgName()
        {
            X509AsymmetricSecurityKey key = new X509AsymmetricSecurityKey(cert);

            Assert.IsFalse(key.IsSupportedAlgorithm(null));
        }