// 异步处理文件
async void GoHash(FileHasher task)
{
#if DEBUG
var timer = new System.Diagnostics.Stopwatch(); timer.Start();
#endif
await task.StartHashFile();
AddResult(task);
#if DEBUG
timer.Stop(); textBox_Stream.AppendText("耗时：" + timer.Elapsed.TotalMilliseconds + "ms" + newline + newline);
#endif
}