public IHttpActionResult AddSuppliers([FromBody] Models.Contact.Supplier supplier)
        {
            var cs = new BLL.ContactManager();

            cs.AddSuppliers(supplier);
            return(Ok());
        }
        public IHttpActionResult DeleteSupplier(long SupplierId)
        {
            var cs = new BLL.ContactManager();

            cs.DeleteSuppliers(SupplierId);
            return(Ok());
        }
        public IHttpActionResult DeleteCustomer(long CustomerId)
        {
            var cs = new BLL.ContactManager();

            cs.DeleteCustomers(CustomerId);
            return(Ok());
        }
        public IHttpActionResult ModifyCustomer([FromBody] Models.Contact.Customer customer)
        {
            var cs = new BLL.ContactManager();

            cs.ModifyCustomers(customer);
            return(Ok());
        }
        public IHttpActionResult GetSupplier(long SupplierId)
        {
            var cs = new BLL.ContactManager();

            return(Json(cs.GetSupplier(SupplierId)));
        }
        public IHttpActionResult GetCustomer(long CustomerId)
        {
            var cm = new BLL.ContactManager();

            return(Json(cm.GetCustomer(CustomerId)));
        }