C#嵌套if语句

using System;

namespace DecisionMaking {

   class Program {

      static void Main(string[] args) {
         //* local variable definition */
         int a = 100;
         int b = 200;

         /* check the boolean condition */
         if (a == 100) {

            /* if condition is true then check the following */
            if (b == 200) {
               /* if condition is true then print the following */
               Console.WriteLine("Value of a is 100 and b is 200");
            }
         }
         Console.WriteLine("Exact value of a is : {0}", a);
         Console.WriteLine("Exact value of b is : {0}", b);
         Console.ReadLine();
      }
   }
}