Ok, I don't know why this stopped working, but when I used to pick the green arrow (Debug) to test my code, it would automatically create the .dll in the Debug folder. For this one program, it has stopped doing that. I have to build the .dll and then use that one (from the Release folder).
I've compared the properties from this program to my other programs, but couldn't find anything that stuck out to me.
Does anyone have an idea of what I should look into to correct this issue and have it start saving the .dll in the Debug folder again?
Check the Compile page (Project->Properties). There is a "Build output path:".
I have noticed that this changes but have not narrowed it down to a cause - it could be when updating references.
I checked that and it was set to "bin/Debug", but I did notice at tthe top of the window, just below the menu bar, there is a pull-down called "Solution Configurations". I set that to "Debug" and now it's working like before. I don't remember changing that, but maybe I did by accident.
Thanks for your response though.