Hello World!

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace Hello_World
 7 {
 8     class Program
 9     {
10         static void Main(string[] args)
11         {
12             Console.WriteLine("Hello World!");
13         }
14     }
15 }