Note: Working with projects is available to registered users only.

Typically a single .cs file contains a single class, but that is not the rule. To add another source file to an existing project:

• Open the FirstProject.mak located in the Projects/Lesson_9 folder
• Select Options/Add Files to Project off the menu
• Select Credits.cs

Both FirstProject.cs and Credits.cs are now listed in the Project Tree pane.

• Double click on FirstProject.cs in the Project Tree pane to open it
• Double click on Credits.cs in the Project Tree pane to open it

The Main() method in FirstProject.cs calls Credits.Display(); defined in the Credits.cs file. As both files are in the same project and belong to the same namespace there is no need to specify using directive.

• Compile and run the project

To remove a file from the project, simply click on it in the Project Tree pane to select it and hit the Delete key.

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