Here are some various articles/tutorials I’ve written in the past ~2 years:
C# Loader Hooking With Mono.Cecil
Click Here!
Terraria 1.1.2 – Decompiling / Recompiling
Click Here!
Creating Packet Editor / Proxy In C#
Click Here!
TSGE – Terraria Save Game Editor
Click Here!
Terraria 1.1.2 – Dumping Data and Textures
Click Here!
Terraria 1.1.2 – Collector Edition Bunny
Click Here!
XNA Hooking Through Reflection / Reference
Click Here!