errors/cs0019-8.cs

   1 // cs0019-8.cs: Operator `-' cannot be applied to operands of type `string' and `ulong'
   2 // Line : 12
   3
   4 using System;
   5
   6 public class C
   7 {
   8     public static void Main ()
   9     {
  10         ulong aa = 10;
  11         ulong bb = 3;
  12         Console.WriteLine("bug here --> "+aa-bb);
  13     }
  14 }