A demonstrative HelloWorld app for Wordpress blogpost - http://bassbytesandbicycles.wordpress.com/2014/06/24/i-am-a-programmer-or-developer/

HelloWorld.cs

public class Hello
{	 	
    public static void Main(string[] args)
    {
        if (args.Length > 0)
        {
            System.Console.WriteLine("Hello, " + args[0] + "!");
        }
        else
        {
            System.Console.WriteLine("Hello, World!");
        }
    }
}