This is a rough test to get MonoUE working as a standalone plugin. See https://mono-ue.github.io/

Current status: Functional (after painfully getting the files in the right places)

• Get MonoUE to compile
• Add code to manually invoke the C# code generator to produce the UnrealEngine.BuiltInModules.dll
• Test one of the mono template game projects
• Create a tool which compiles the C++/C# projects and moves files into their correct places for easy install

• Add the plugin to a C++ game project as a game plugin
• Compile the C++ game project (don't ever run this game project)
• Compile MonoUE/Managed/MonoBindings/UnrealEngine.Runtime.sln and MonoUE/Managed/UnrealEngine.MainDomain.sln and then copy the output dlls over to MonoUE/ThirdParty/mono/fx/MonoUE/v1.0
• Now copy the entire MonoUE folder over to the engine plugins folder /Engine/Plugins/MonoUE
• Open an unreal project, MonoUE should be enabled. Check the console logs for 'mono'.

• In the UE4 console type "MonoGen", this will generate a bunch of .cs/.csproj files and a .sln file under "MonoUE/Intermediate/Build/Win64/Mono/". Currently this is going to the wrong location so you need to delete everything other than the "UnrealEngine.BuiltinModules" folder, then fix up the MonoUE.EngineBinding.props path in the .csproj, then open the .csproj in Visual Studio manually (with the generated .sln deleted) and then compile. You then likely need to copy the output dll into various places.

• If the game sln says "Project file is incomplete. Expected imports are missing." this means that the Sdk resolver isn't functioning properly. Ensure it is installed by running the installer MonoUE.MSBuildResolver.vsix. If it is installed and it still fails then it likely means it can't find your UE4 install (but there currently isn't any logging to tell you this). So instead you could temporarily provide the full Sdk path in your csproj to skip the resolver step. So in your game .csproj edit <Project Sdk="Mono.UE4.Sdk" to the full path of the Sdk folder (e.g. "C:/Program Files/Epic Games/UE_4.20/Engine/Plugins/MonoUE/MSBuild/Sdks/Mono.UE4.Sdk")
• If the game sln complains about "project.assets.json" try temporarily removing the folder discussed here dotnet/sdk#1321 (comment). This may cause problems creating / opening other .NET standard projects so avoid permanently deleting the folder.