Fill the ringbuffer as data is being transmitted

[excelosaurus]

In ProtoDataStream.cs, the Read method calls FillBuffer, which replenishes the circular buffer synchronously. In a WCF scenario with hundreds of concurrent users, I'd like the circular buffer to be replenished while transmission occurs. That's way beyond my game, really. I can imagine that a Task launched in the constructor could monitor the circular buffer and keep it close to capacity. What do you think? Or something along those lines: https://code.msdn.microsoft.com/Custom-WCF-Streaming-436861e6