c# deriving from int32

Question

i have several classes with members called \'Id\'. Originally i wanted to store these as ints, but i would like some layer of protection, to make sure i don\'t accidentally

Answer 1

 public static explicit operator RoomId(int value) {
     return new RoomId { Id = value };
 }

You could then do:

 RoomId variable = (RoomId)10;

It's not possible to derive a class from Int32 or any other value type in C#.