Resource.designer.cs won't update

Question

This seems to be a chronic issue with Xamarin Studio, and like many others I can't get my Resource.designer.cs file to update as I edit my layout files. I renamed some of my layout files, however Resource.designer.cs still has the old names so the app no longer builds and I'm completely blocked. I'm using the latest stable versions of Mono / Xamarin.Android / Androik SDK components: https://gist.github.com/justintoth/335cbd76cabf87385a4b11c8501c5ce8

I've read all of the other SO / Xamarin threads, and have tried:

• Changing the id of an existing layout element to trigger a refresh
• Clean / rebuild
• Deleting bin / obj folders
• Erasing the contents of Resource.designer.cs then rebuilding (it remains empty)
• Deleting Resource.designer.cs, rebuilding, then re-adding it to the project (the freshly generated file is completely empty)
• Double-checking that I don't have any resource files in my project with bad symbols, e.g. dashes
• Ensuring I have the necessary elements in the first PropertyGroup of the project file: https://gist.github.com/justintoth/c4e9b212754824587da465495f92555c

At this point, I'm completely blocked and have no other things to try. I could really use some help...