using System;

public class Program

{

    public static void Main()

    {

        int num1, num2, num3;

         // set the value of the three numbers

         num1 = 10;

         num2 = 20;

         num3 = 50;

         if (num1 > num2) {

            if (num1 > num3) {

               Console.Write("Number one is the largest!");

            } else {

               Console.Write("Number three is the largest!");

         }

      }

      else if (num2 > num3)

         Console.Write("Number two is the largest!");

      else

         Console.Write("Number three is the largest!");

      }

    }

​