您将需要使用NetStream读取的回调来处理此问题。坦率地说，将复制逻辑包装到其自己的类中可能会更容易，以便您可以维护活动Streams的实例。
这是我的处理方式（未经测试）：
public class Assignment1{ public static void NetToFile(NetworkStream net, FileStream file) { var copier = new AsyncStreamCopier(net, file); copier.Start(); } public static void NetToFile_Option2(NetworkStream net, FileStream file) { var completedEvent = new ManualResetEvent(false); // copy as usual but listen for completion var copier = new AsyncStreamCopier(net, file); copier.Completed += (s, e) => completedEvent.Set(); copier.Start(); completedEvent.WaitOne(); } /// <summary> /// The Async Copier class reads the input Stream Async and writes Synchronously /// </summary> public class AsyncStreamCopier { public event EventHandler Completed; private readonly Stream input; private readonly Stream output; private byte[] buffer = new byte[4096]; public AsyncStreamCopier(Stream input, Stream output) { this.input = input; this.output = output; } public void Start() { GetNextChunk(); } private void GetNextChunk() { input.BeginRead(buffer, 0, buffer.Length, InputReadComplete, null); } private void InputReadComplete(IAsyncResult ar) { // input read asynchronously completed int bytesRead = input.EndRead(ar); if (bytesRead == 0) { RaiseCompleted(); return; } // write synchronously output.Write(buffer, 0, bytesRead); // get next GetNextChunk(); } private void RaiseCompleted() { if (Completed != null) { Completed(this, EventArgs.Empty); } } }}
