Very good! A few minor performance comments.

1. In your EncodeDictionary, you sort byte arrays by converting them to string. Correct but subeffective. See e.g. this: http://stackoverflow.com/q/19695629/126995 but add checks for nulls, authors of that code forgot about that.

2. You don’t need a dedicated thread to wake up every 1-10 seconds and do something small. Thread are expensive system resources, they own stack, cache misses are guaranteed then they wake up, etc. If your compiler supports async-await, use that instead + endless loop + Task.Delay inside the loop. If not, System.Timers.Timer class will do.