How do I implement the repository pattern in C#?

How do I implement the repository pattern in C#?

To implement the repository pattern in C#, you start by defining an interface for your repository that outlines the methods for data access.

What methods should I include in the repository interface?

Common methods include Add, Update, Delete, and GetById. You can also add GetAll and any specific queries you need.

Can you show me a simple example of a repository interface?

Sure! Here's a basic example:

public interface IRepository<T>
{
    void Add(T entity);
    void Update(T entity);
    void Delete(int id);
    T GetById(int id);
    IEnumerable<T> GetAll();
}

How do I implement this interface in a concrete class?

You can create a class that implements the interface and provides the actual data access logic, like this:

public class Repository<T> : IRepository<T>
{
    private readonly DbContext _context;

    public Repository(DbContext context)
    {
        _context = context;
    }

    public void Add(T entity) { /* implementation */ }
    public void Update(T entity) { /* implementation */ }
    public void Delete(int id) { /* implementation */ }
    public T GetById(int id) { /* implementation */ }
    public IEnumerable<T> GetAll() { /* implementation */ }
}