Operator << cannot be applied to operands of type long and long

Question

I am trying to use the << operator on a long, like so:

((long) num3) << ( 2 + (long) num4)))

This gives me the following error:

Operator << cannot be applied to operands of type long and long.

If I don't cast num4 to a long, there is no error. However, I cannot keep it as an int. Is there any other way around this?

Answer 1

The right operand has to be an int, not a long. It wouldn't make sense to use a long as the number of bits to shift, since integral types in C# never have more than 64 bits.