public static void TryCatchDemo(){
    int i = 5, r = 0, j = 0;

    /* Windows: Compile time error. On MONO: Run time error 
    r = i / 0;
    Console.WriteLine("r is {0}", r);   
    */

    try {
      r = i / j;
      Console.WriteLine("r is {0}", r);
    } catch(DivideByZeroException e){
        Console.WriteLine("r could not be computed");
    }   
  }