WPF 简单判断主线程界面是否卡顿的方法

        private static async Task<bool> CheckDispatcherHangAsync(Dispatcher dispatcher)
        {
            var taskCompletionSource = new TaskCompletionSource<bool>();
            _ = dispatcher.InvokeAsync(() => taskCompletionSource.TrySetResult(true));
            await Task.WhenAny(taskCompletionSource.Task, Task.Delay(TimeSpan.FromSeconds(2)));
            // 如果任务还没完成，就是界面卡了
            return taskCompletionSource.Task.IsCompleted is false;
        }