Program.cs

using System;

/* This program writes "Hello world!" to the console window. 
   It also demonstrates the use of multi-line comments. */

namespace CommentMulti
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!"); /* This multi-line style of comments can reside on a single-line, too. */
        }
    }
}