using System;

public class Program

{

    public static void Main()

    {

        int x;

        Console.WriteLine("Write an even number");

        x = int.Parse(Console.ReadLine());

        while (x % 2 != 0) 

        {

            ///This will occur ONLY if the number given is not even

            Console.WriteLine("I told you to write an even number!");

            Console.WriteLine("Please try again");

            x = int.Parse(Console.ReadLine());

        }

​

        Console.WriteLine("Thanks!");

    }

}