How to: Change the Application Type (Visual Basic, C#)
The Application Type property for a project determines the type of application to build: Windows Application, Windows Class Library, Windows Service, Command Line Application, or Server Class Library. Different project properties and options are available depending on the application type.
The default Application Type is the same as the Project Type chosen in the Add Project dialog box.
The Application Type property can be set on the Application page of the Project Designer.
To change the application type
With a project selected in Solution Explorer, on the Project menu, click Properties.
Click the Application tab.
For a Visual Basic project, in the Application Type list, click the desired type. For a C# project, in the Output Type list, click the desired type.