一个接一个地运行任务

Question

  

错误：无法从system.thread.tasks.task转换为   system.action

Task A = Task.Run(() => Filecopy.COPY_F(txtpatterns.Lines, txtsourcepath.Text));

Task B = Task.Run(() => Unzip.Data(Filecopy.zipfilepath));

Task C = Task.Run(() => GIO_LOad.Data(Unzip.GIOlist));


Task t = null;
t = Task.Factory.StartNew(() => A
                             .ContinueWith(B)
                             .ContinueWith(C),
                             TaskScheduler.FromCurrentSynchronizationContext()));

我试图逐个运行这些任务，因为任务B将从任务A获得List<string>而任务c将从任务B获得字符串列表。