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.
   
   C#

   // 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: 

 

 

C#

// 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.

C#

/* A "Hello World!" program in C#.
This program displays the string "Hello World!" on the screen. */