async public void OnButtonClick4() { Debug.LogFormat("ID {0}", Thread.CurrentThread.ManagedThreadId); { Debug.Log("OnButtonClick4-1 Init "); var cancelTokenSource = new CancellationTokenSource(); var aa = Task.Run(Test4Async); Debug.Log("OnButtonClick4-1 End"); } { Debug.Log("OnButtonClick4-2 Init "); var cancelTokenSource = new CancellationTokenSource(); var aa = Task.Run(Test4Async); Debug.Log..