control the operator evaluation sequence

   
  

using System;
public class MainClass {
    static void Main(string[] args) {
        int a;
        a = -42;
        Console.WriteLine("{0}", a);

        int b = 2;
        int c = 42;

        a = b * (-c);
        Console.WriteLine("{0}", a);

        c = -42;
        a = b * (+c);
        Console.WriteLine("{0}", a);
    }
}