How do you configure EF Core Repository and Unit of Work in .NET Core?

Short answer: Register DbContext with DI in Startup.cs: services.AddDbContext<AppDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConne ction"))); Implement Repositories for entities injecting AppDbContext. Implement Unit of Work which holds multiple repositories and calls SaveChanges() on the DbContext: public interface IUnitOfWork : IDisposable

Example code

{ IProductRepository Products { get; } int Complete();
}
public class UnitOfWork : IUnitOfWork
{
private readonly AppDbContext _context;
public IProductRepository Products { get; private set; }
public UnitOfWork(AppDbContext context)
{
_context = context;
Products = new ProductRepository(_context);
}
public int Complete() => _context.SaveChanges();
public void Dispose() => _context.Dispose();
} Register UnitOfWork in DI container as Scoped.

Real-world example (ShopNest)

ShopNest payment fees use Strategy: IFeeCalculator with UPI/Card implementations chosen at runtime.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.