[root@linode terraria]# mono TerrariaServer.exe

Unhandled Exception: System.TypeLoadException: Could not load type 'Terraria.ProgramServer' from assembly 'TerrariaServer, Version=1.0.4.0, Culture=neutral, PublicKeyToken=null'.
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeLoadException: Could not load type 'Terraria.ProgramServer' from assembly 'TerrariaServer, Version=1.0.4.0, Culture=neutral, PublicKeyToken=null'.