public void Test_GetCreationTimeUtc()
        {
            var storage = new DiskIsolateStorage("Test", baseDirectory);
            storage.InitStore();
            string storePath = Path.Combine(baseDirectory, "Test");

            //创建目录
            string dir = "Test" + Guid.NewGuid().ToString();
            storage.CreateDirectory(dir);
            var dirCreatedDate = Directory.GetCreationTimeUtc(Path.Combine(storePath, dir));

            //创建文件
            string testString = "This is teststring";
            MemoryStream stream = new MemoryStream();
            byte[] buffer = Encoding.Default.GetBytes(testString);
            stream.Write(buffer, 0, 18);
            var filePath = Guid.NewGuid().ToString() + ".txt";
            storage.CreateFile(filePath, stream);
            var fileCreatedDate = File.GetCreationTimeUtc(Path.Combine(storePath, filePath));

            var dirResult = storage.GetCreationTimeUtc(dir);
            var fileResult = storage.GetCreationTimeUtc(filePath);

            Assert.AreEqual(dirCreatedDate, dirResult);
            Assert.AreEqual(fileCreatedDate, fileResult);
        }