Convert.ToByte(MyString) concatination problems, is it converted then converted back?

[Zirus Blackheart]

Hi :-)

I'm having a very strange problem with Convert.ToByte(MyString)
Is it converted to the byte then converted back? as i'm getting concatination when I attempt to add to it again, and multiplycation ect is saying its still a string, even though I have done the convert and done some maths with it b4.

Here is some code to demostrate this weirdness...

This throws out the number 8, which is correct.

            string myString = "10";

            Console.WriteLine(Convert.ToByte(myString) - 2);

This just concatenates (as I understand it, C# has overloaded operators so this is correct but that still means there is no conversion happening)

            string myString = "10";

            Convert.ToByte(myString);
            myString += 2;
            Console.WriteLine(myString);

This says its still a string.

            string myString = "10";

            Convert.ToByte(myString);
            myString -= 2;

As you can tell this is confusing the hell out of me, I want to convert my string to a byte so I can do some maths on it, I can do that, but it doesn't stay converted.... why?