ProjectLib/ProjectLibrary/Repositores/IOrderRepository.cs

namespace ProjectLibrary.Repositories
{
    using ProjectLibrary.Entites;

    public interface IOrderRepository
    {
        IEnumerable<Orders> ReadOrders(DateTime? StartDate = null, DateTime? EndDate = null);
        Orders ReadOrderById(int id);
        void CreateOrder(Orders order);
        void DeleteOrder(int id);
    }
}