namespace Calculator
{
    using System;
 
    public class Calc
    {
		// Default ctor.
        public Calc(){}
 
		// A single method.
		public int Add(int x, int y)
		{
			return x + y;
		}
 
        public static int Main(string[] args)
        {
			Calc c = new Calc();
			int ans = c.Add(10, 84);
			Console.WriteLine("10 + 84 is {0}.", ans);
			return 0;
        }
    }
}
 

// The HelloMessage Class
using System;
using System.Windows.Forms;
 
class HelloMessage
{
     public void Speak()
     {
	MessageBox.Show("Hello...");
     }
}
 

// The first C# app of the book...
using System;
 
// Add this!
// using System.Windows.Forms;
 
class TestApp
{
     public static void Main()
     {
	// System.Console.WriteLine("Testing! 1, 2, 3");
 
	// Add this!
	// MessageBox.Show("Hello...");
	HelloMessage h = new HelloMessage();
	h.Speak();
     }
}

namespace VSNETTestApp
{
    using System;
	using System.Windows.Forms;
 
 
    /// <summary>
    ///    Summary description for Class1.
    /// </summary>
    public class AppClass
    {
        public AppClass()
        {
            //
            // TODO: Add Constructor Logic here
            //
        }
 
        public static int Main(string[] args)
        {
            Console.WriteLine("Hello again!");
			MessageBox.Show("Hey...");
            return 0;
        }
    }
}