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

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

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.