I want to about this error

Accepted answer

Update the Retun type on line number 18 to "BookRepository.Models.Book".
Or else please check the return type of "Find" method and update in particular function.
You need to be very specific about the return type of methods you are writing.

Uttam Kumar4y ago

There can be couple of ways to fix this.

You change either return type to BookRepository.Data.Models.Book

Public BookRepository.Data.Models.Book GetBookByID(int Id)

{

return _db.Books.Find(Id);

}

Or change return type to BookRepository.Models.Book in the Find() Method.

Muhammad Imran Ansari4y ago

Your return type(model class object) and ORM/database object (returning through Find() method) are mismatching.

Change you return type according to the database object.