public void DistrictControllerTest_POST_DELETE()
        {
            var d = new District()
            {
                Id   = 0,
                Name = "Norway",
                PrimarySalesperson = new Salesperson()
                {
                    Id = 4
                }
            };

            var countOld = controller.Get().ToList().Count;

            controller.Post(d);
            var countNew = controller.Get().ToList().Count;

            Assert.AreNotEqual(countOld, countNew);

            d = controller.Get().ToList().SingleOrDefault(x => { return(x.Name.Equals(d.Name) && x.PrimarySalesperson.Id.Equals(d.PrimarySalesperson.Id)); });
            controller.Delete(d.Id);
            countNew = controller.Get().Count();

            Assert.AreEqual(countOld, countNew);
        }