Question

I am trying to implement a generic repository but I am snagged. Here is a summary of my object model. The problem is that the concrete repository, “UserAccountRepositoryStub” will not compile. The error is:

The type User has to be convertible to type IRepository…

IRepostory:

    public interface IRepository<T> where T : IEntity
{
...
}

Abstract Repository:

public class AbstractRepository<T> where T : class, IEntity, IRepository<T> {...}

IUserAccountRepository:

public interface IUserAccountRepository

User:

public class User : IEntity{...}

UserRepositoryStub(concrete):

public class UserAccoutRepositoryStub : AbstractRepository<User>, IUserAccountRepository

Answer 1

The definition of AbstractRepository<T> should probably be

public class AbstractRepository<T> : IRepository<T> where T : class, IEntity {...}

because you want the repository to implement IRepository<T> not the objects in it, right?