public void CreateGUID()
        {
            var LGuid = FClientFile.GetGUID();

            FClientFile.CreateGUID();
            try
            {
                FClientFile.GetGUID();
                Assert.Fail();
            }
            catch
            {
            }
            FClientFile = null;
            var LManager = (IAppClientFileManagerService)TestHost.CurrentInstance.AppInstance;

            FClientFile = LManager.GetCurrentClientFile();
            Assert.AreNotEqual(LGuid, FClientFile.GetGUID());
        }