static void Use()
{
Digit a = (Digit)5;
Digit b = (Digit)3;
Digit plus = a + b;
Digit minus = a - b;
bool equals = (a == b);
Console.WriteLine("{0} + {1} = {2}", a, b, plus);
Console.WriteLine("{0} - {1} = {2}", a, b, minus);
Console.WriteLine("{0} == {1} = {2}", a, b, equals);
}
void Main()
{
Digit d = (Digit)8;
byte b = d;
}