1. ASP.NET Web applications: These include dynamic and data driven browser based applications.

2. Windows Form based applications: These refer to traditional rich client applications.

3. Console applications: These refer to traditional DOS kind of applications like batch scripts.

4. Component Libraries: This refers to components that typically encapsulate some business logic.

5. Windows Custom Controls: As with traditional ActiveX controls, you can develop your own windows controls.

6. Web Custom Controls: The concept of custom controls can be extended to web applications allowing code reuse and modularization.

7. Web services: They are ?web callable? functionality available via industry standards like HTTP, XML and SOAP.

8. Windows Services: They refer to applications that run as services in the background. They can be configured to start automatically when the system boots up.