public class Order : BaseDeletableModel<int>
    {
        public int Quantity { get; set; }

        public string IssuerId { get; set; }

        public virtual ApplicationUser Issuer { get; set; }
    }

    public class OrderProducts : BaseDeletableModel<int>
    {
        public int Quantity { get; set; }

        public int OrderId { get; set; }

        public virtual Order Order { get; set; }
    }

    public class OrderServices : BaseDeletableModel<int>
    {
        public int Quantity { get; set; }

        public int OrderId { get; set; }

        public virtual Order Order { get; set; }
    }