NetworkStream.Read会挂起/阻止的原因是什么？

MSDN documentation seems to suggest that NetworkStream.Read will always return immediately. If no data is found it returns 0. However, I have some code that is currently deployed, that only in some cases (and I haven't figured out which ones yet), NetworkStream.Read appears to hang. Here is the stack trace which i was able to gather from a dump fileMSDN documentation seems to suggest that Networ