This app will give you real applications in the use of ASP.NET WEB API

You will see the full source code of the demo. You will see how to use:
1. Text Plain in ASP.NET Web API
2. Text HTML in ASP.NET Web API
3. Use Parameters in ASP.NET Web API
4. Convert Object to/from JSON in ASP.NET Web API
5. Convert List Objects to/from JSON in ASP.NET Web API
6. Use POST Method in ASP.NET Web API
7. Use PUT Method in ASP.NET Web API
8. Use DELETE Method in ASP.NET Web API
9. Convert List Objects to/from JSON in ASP.NET Web API and Entity Framework
10. Create Operator in ASP.NET Web API and Entity Framework
11. Update Operator in ASP.NET Web API and Entity Framework
12. Delete Operator in ASP.NET Web API and Entity Framework
13. Security in ASP.NET Web API
14. Security in ASP.NET Web API and Entity Framework

You also see the results after the demo with the illustrations.

You can also copy the code in this app and use it on your project.