BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.
--Because there are way more bytes used to represent the other GUIDs than this one, I just appended -0000-0000-0000-000000000000 to this per zeromus' request.
-Got rid of the hex part of the BytesToString function. We apparently have BizHawk.Util.BytesToHexString.
-Converted BytesToString to r.ReadStringFixedAscii, an extension method. I've determined that extension methods are cool and that I should use them more often.