public void IdentifierCharTests( )
        {
            Assert.AreEqual('_', IdentifierChar.Parse("_"));
            Assert.AreEqual('a', IdentifierChar.Parse("a"));
            Assert.AreEqual('A', IdentifierChar.Parse("A"));
            Assert.AreEqual('0', IdentifierChar.Parse("0"));
            Assert.AreEqual('9', IdentifierChar.Parse("9"));

            // Greek alphabet Unicode delta is considered a letter
            Assert.AreEqual('\u0394', IdentifierChar.Parse("\u0394"));
        }
 public void IdentifierCharExceptionTest( )
 {
     char result = IdentifierChar.Parse(":");
 }