乐刻健身房 间隔天数

   [Test]
        public void DateTest()
        {
            var date1 = new DateTime(2019, 4, 1);
            var date2 = new DateTime(2019, 4, 3);
            var delta1 = date2 - date1;
            Console.WriteLine(delta1.Days - 1);

            var date3 = new DateTime(2020, 8, 17);
            var delta2 = date3 - date1;
            Console.WriteLine(delta2.Days - 1);
        }

一共间隔了503天