BsonBuffer.LoadFrom contains the following loop:

while (bytesPending > 0) {
var bytesRead = stream.Read(localChunk, localChunkOffset, bytesPending);
if (bytesRead == 0)

{ // TODO: timeout? Thread.Sleep(5); // just enough to not be busy waiting }

else

{ localChunkOffset += bytesRead; bytesPending -= bytesRead; }

}

The "timeout" is a necessity here, since when the connection is gracefully closed from the MongoDB side (by stopping the server), the client connection remains active:
netstat -a -n | find ":27017"
TCP client:5171 mongodb:27017 CLOSE_WAIT

This leads to an endless loop that just hangs the client thread when the server is gone.