Hello World - Your First Program (C# Programming Guide)

The following procedure creates a C# version of the traditional "Hello World!" program. The program displays the string Hello World!

To create and run a console application

  1. Start Visual Studio.
  2. On the File menu, point to New, and then click Project.
  3. In the Templates Categories pane, expand Visual C#, and then click Windows.
  4. In the Templates pane, click Console Application.
  5. Type a name for your project in the Name field.
  6. Click OK.
    The new project appears in Solution Explorer.
  7. If Program.cs is not open in the Code Editor, right-click Program.cs in Solution Explorer and then click View Code.
  8. Replace the contents of Program.cs with the following code.
    // A Hello World! program in C#.
    using System;
    namespace HelloWorld
    {
        class Hello 
        {
            static void Main() 
            {
                Console.WriteLine("Hello World!");
    
                // Keep the console window open in debug mode.
                Console.WriteLine("Press any key to exit.");
                Console.ReadKey();
            }
        }
    }
    
    
    
  9. Press F5 to run the project. A Command Prompt window appears that contains the line Hello World!
Comments: 
 
 
// A Hello World! program in C#.


You can also comment out a block of text by enclosing it between the /* and */ characters. This is shown in the following example.
/* A "Hello World!" program in C#.
This program displays the string "Hello World!" on the screen. */

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