public void compareEqualUserIdentifiers()
        {
            CommunicationUserIdentifier identifier1 = new CommunicationUserIdentifier(_id);
            CommunicationUserIdentifier identifier2 = new CommunicationUserIdentifier(_id);

            Assert.True(identifier1.Equals(identifier1));
            Assert.True(identifier1.Equals(identifier2));
        }
        public void compareWithNonUserIdentifier()
        {
            CommunicationUserIdentifier identifier1 = new CommunicationUserIdentifier(_id);
            Object identifier2 = new Object();

            Assert.False(identifier1.Equals(identifier2));
        }