Glasia
Sodbuster
If someone on Windows tries to name a screenshot via /mapscreenshot as "con" or any other forbidden Windows name, the game should detect that and enclose the name in underscores or similar to prevent a "Failed" error. Terraria does that with their character files when someone calls their character "con" which shows it is possible to implement as Terraria also is written in C# on XNA/.NET.