I've been working on a little app of sorts to generate a few bits of text. It actually just draws random values from dictionaries and prints them on the screen (it's for a school project). I opted to do it in Monogame because I'm familiarized with it and would like to have background images, etc.
Anyway, I was doing this on the WP also, and had no issues there. However, on the PC, I changed the background image for another one with the same name and, since, all I get is this:
An unhandled exception of type 'System.ArgumentNullException' occurred in mscorlib.dll
Additional information: Valor não pode ser nulo.(Value can't be null)
It doesn't point out anything in the code, just shows this on a blank screen of sorts.
After a while I gave up and started a new Windows project, in which I just pasted the code from earlier, added the images back and it worked flawlessly. According to a friend of mine, this might be a Monogame issue, though I don't remember ever getting this before. Also, as I've stated, the same code works if I put it in a new project or run it on the Windows Phone.
Any tips on what I could be doing wrong? Or is it something on the framework's side?