Setting up a MonoDevelop solution and project for RimWorld modding

This tutorial will show you how to create a new MonoDevelop solution and project, and how to properly connect it to RimWorld. You’ll need to have an installation of Mono that supports .NET 3.5 - here is a tutorial on how to install it.

• Open Monodevelop (see this guide to install with .NET 3.5 support)
• Create a new solution
  • Click File > New > Solution
  • Select the C# tab
  • Select Library (C#)
  • Enter your mod’s name into the name field.
  • Set the location to “Source” in your mod’s directory. Eg, RimWorld/mods/ModName/Source.
  • Optional: Untick “Create a directory for solution”/“Create a project within the solution directory”.
• Add references to the RimWorld DLL
  • In the left panel, right click ModName > ModName > References. Select Edit References.
  • Go to the .NET Assembly tab
  • Click browse and go to RimWorld/RimWorldLinux_Data/Managed. Select Assembly-CSharp.dll and UnityEngine.dll
  • Click open and then exit the edit references dialog.
  • For each reference, right click and decheck “local copy”.
• Set .NET framework to .NET 3.5
  • Right click project (ModName > Modname) in the left panel and select options
  • Go to Build > General
  • Select Mono / .NET 3.5 in the target framework
• Set output directory
  • Go to Build > Output
  • Set the output folder to RimWorld/mods/ModName/Assemblies.
• Profit!

Some of this information was learned from this wiki page.