public void Diff()
{
var storage = Storage.Create();
var log = LogContext.Create(storage);
storage.Name = "正式名称";
storage.IsChecked = false;
var diff = log.Diff(storage);
Assert.True(diff);
Console.WriteLine(log);
storage.Name = null;
diff = log.Diff(storage);
Assert.True(diff);
Console.WriteLine(log);
}