StreamReader.ReadToEnd() 中的 AccessViolationException

Question

在 WebRequest 响应流上调用 ReadToEnd() 时，有时会收到 AccessViolationException。

我创建一个后台线程来执行此操作，将结果发布回 UI 线程，并让该线程自行退出。我的应用程序大约每分钟执行一次。它似乎运行良好几个小时，然后随机崩溃。

谁能帮助我理解为什么会发生这种情况？

非常感谢！

代码

String uri = ... ;
String data;

WebRequest request = WebRequest.Create(uri);
request.Timeout = (int) TimeSpan.FromSeconds(30).TotalMilliseconds;

using (Stream stream = request.GetResponse().GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
    data = reader.ReadToEnd(); // <-- exception...sometimes...

异常

System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at System.Net.UnsafeNclNativeMethods.OSSOCK.recv(IntPtr socketHandle, Byte* pinnedBuffer, Int32 len, SocketFlags socketFlags)
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, SocketError& errorCode)
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.IO.StreamReader.ReadBuffer()
at System.IO.StreamReader.ReadToEnd()
at // my code here