i am asking a some question to c#

using System;

class MyProgram
{  
   public static void Main()
     { Console.WriteLine("massage");  }

}

This will definitely write a 'massage' in C#

If you are asking about writing a email: refer to Ravi Bhavnani's Solution here.

And if you are talking about MsgBox then use :

System.Windows.Forms.MessageBox.Show("Hello");

Please be specific..