Source file System.Drawing could not be found

Hey guys, I'm compiling a mono app with winforms in it and I "believe" I have everything installed correctly but I'm still getting errors. The command I'm using is:

gmcs -out:bin/Debug/Windows/Test.exe -debug -r:System, System.Drawing, System.Windows.Forms Test.cs WinFormMain.cs 

The out put:

error CS2001: Source file `System.Drawing,' could not be found
error CS2001: Source file `System.Windows.Forms' could not be found
Compilation failed: 2 error(s), 0 warnings

I can obviously include System just fine and I verified that the dll's do exist in the system :( am I missing something?

Close, but no cigar. Use

-r:System -r:System.Drawing -r:System.Windows.Forms

not

-r:System, System.Drawing, System.Windows.Forms

Yup, haha, that did do it. I must have read the man page wrong. Thanks!