Assembly not available error

I'm sorry if this is an ultra-noobish question, but I've never tried my hand at C# development before and this seems to be a really simple problem that I just can't find the solution for.

I'm trying to build Banshee player from source. The references gio-sharp, gkeyfile-sharp, glib-sharp, gtk-sharp, gtk-sharp-beans and libgudev (possibly some others, I'm only listing from one source file at the moment) all give me an "Assembly not available for Mono / .NET 3.5 error (in Mono 2.10.5) error" when I open the solution file in Monodevelop. I'm new to C# so I don't know what the hell is going on, but it looks like these are the C# equivalent of java imports, and they're supposed to be included in the mono equivalent of the "classpath", but I can't figure out how to.

I've got all the packages installed in ubuntu, but none of them show up in the "Edit References" dialogue when I try to select it.

EDIT: No answers yet? I thought there was going to b开发者_运维问答e an obvious fix. Please help!

You probably need some dev packages, which would include the .pc files that register those assemblies with pkgconfig so the IDE can discover them.