public async Task DistributedCache_Get_and_Set_DateTimeAsync()
        {
            // arrange
            var key      = "foo-datetime";
            var expected = DateTime.Now;

            // act
            await _cache.SetAsync(key, expected, _option);

            var actual = await _cache.GetDateTimeAsync(key);

            // assert
            Assert.Equal(expected, actual);
        }