gistfile1.cs

public class CustomerController : Controller
{
	private IMyDbContext _dbContext;

	public CustomerController(IMyDbContext dbContext)
	{
		_dbContext = dbContext;
	}

	public ActionResult Index()
	{
		return View(_dbContext.Customers.OrderBy(c => c.Name).ToList());
	}
}
public interface IMyDbContext
{
	IQueryable<Customer> Customers { get; set; }
}

public class MyDbContext : IMyDbContext,DbContext
{
	public IQueryable<Customer> Customers { get; set; }
}