title: System.Drawing missing assembly or reference
body: <p>I want to use the Bitmap class under an XNA project declared on System.Drawing but it says that I'm missing an assembly or reference. I added System.Drawing to my references and changed my target framework after seeing <a href="https://stackoverflow.com/questions/8553136/system-drawing-namespace-not-found-under-console-application">this post</a>. I opened 3 or 4 new projects doing the same but nothing changes. I am about to go crazy. What's the deal with this?</p>