.NET and COM Interoperability Handbook, The

Creating a Simple Hello World Application

A simple hello world application written in C# follows:

namespace HelloWorld
{
    using System;
    public class Hello
    {
        public Hello()
        {
            // Constructor logic goes here
        }
        public static int Main(string[] args)
        {
      Console.WriteLine("Hello: ");
         if (args.Length==0)
        Console.WriteLine("who ever you are!");
      else
         for (int i=0;i<args.Length;i++)
        Console.Write(" {0} ", args[i]);
           return 0;
        }
    }
}

Let's examine the code a little deeper. First, notice that the code is enclosed within a namespace called HelloWorld

namespace HelloWorld
{
//...
}

The class name is Hello, therefore, the full name of the class that I have declared here is called HelloWorld.Hello, that is, the name is [NamespaceName].[ClassName].

Note

The fact ...