C#执行基本算术运算

using System;

namespace Sample {

   class Demo {

      static void Main(string[] args) {
         int num1 = 50;
         int num2 = 25;
         int result;

         result = num1 + num2;
         Console.WriteLine(Value is {0}, result);

         result = num1 - num2;
         Console.WriteLine(Value is {0}, result);

         result = num1 * num2;
         Console.WriteLine(Value is {0}, result);

         result = num1 / num2;
         Console.WriteLine(Value is {0}, result);

         result = num1 % num2;
         Console.WriteLine(Value is {0}, result);

         result = num1++;
         Console.WriteLine(Value is {0}, result);

         result = num1--;
         Console.WriteLine(Value is {0}, result);

         Console.ReadLine();
      }
   }
}