can you explain what you want to do? gnome-sharp is just a meta package for a smooth update to a split build.

I'm just tried to compile monodevelop-git. Compilation failed with './GnomePlatform.cs(45,23): error CS0234: The type or namespace name `ThumbnailFactory' does not exist in the namespace `Gnome'. Are you missing an assembly reference?. I installed gnome-sharp 2.24.1-1 (from ARM) and the package compiled successfully.

And how couldn't it be a problem with monodevelop-git? Did you check the changelog for gnome-sharp

Before the upgrade I have compiled monodevelop 2.6 beta 2 (2.5.91) and than monodevelop-git with gnome-sharp 2.24.1. After pacman update I tried to compile monodevelop 2.6 beta 3 (2.5.92) an got an error than tried 2.6 beta 2 and gon an error again. Where I can check changelog? pacman -Qc gnome-sharp shows me nothing.

I am experiencing the same problems as morakh...

I've been running with beta 2 for a while with gnome-sharp 2.24.1. I just recently upgraded my computer to the whole gnome-3 shebang, and received the new gnome-sharp package. I'm no longer able to build monodevelop 2.6 beta 2 or beta 3.

Downgrading the package solves the build problems.
@morakh
Untill it's fixed you can find the old package here: http://schlunix.org/archlinux/extra/os/x86_64/
Then you can build the new monodevelop :)

I believe the problem is that the new gnome-sharp package does not include a "gnome-sharp-2.0.pc" file inside /usr/lib/pkgconfig - monodevelop is looking for it, and it exists for package 2.24.1.

gnome-sharp 2.24.2 depends on libgnome-sharp and it has the right pkg-config files. Can somebody at least paste some logs?

Doing a:
pacman -S gnome-sharp
ls /usr/lib/pkgconfig/ | grep "gnome-sharp"

Returns nothing, whereas:
wget http://schlunix.org/archlinux/extra/os/x86_64/gnome-sharp-2.24.1-1-x86_64.pkg.tar.gz
pacman -U gnome-sharp-2.24.1-1-x86_64.pkg.tar.gz
ls /usr/lib/pkgconfig/ | grep "gnome-sharp"

Gives " gnome-sharp-2.0.pc". So somethig *is* broken in the new gnome-sharp. Building monodevelop 2.6. beta 3 with this pkgbuild: http://pastebin.com/RtspAABJ

Gives this log (with broken gnome-sharp): http://pastebin.com/GVxbvBqu

Building with working gnome-sharp produces this output: http://pastebin.com/rCNFZZUG

Whereafter I can install and run monodevelop. Upgrading gnome-sharp after successfull build makes monodevelop bitch out with 20 null reference exceptions during startup...

Funniy thing though (sorry for the spamming).

Performing:
pacman -S gnome-sharp
pacman -Ql libgnome-sharp

Returns that there should be a "gnome-sharp-2.0.pc" file in "/usr/lib/pkgconfig" - but it is not there, as my previous post also suggests.

pacman -Qo /usr/lib/pkgconfig/gnome-sharp-2.0.pc
/usr/lib/pkgconfig/gnome-sharp-2.0.pc is owned by libgnome-sharp 2.24.2-1

i suspect you did pacman -Uf gnome-sharp-old and you lost the pkgconfg while having libgnome-sharp installed. you should reinstall this package

i couldn't try to build that since it needs mono-addios 0.6 and we have 0.5. Can you paste config.log ?

i can recompile monodevelop from extra fine and i don't see any reasons not to build the beta version. I'm going to close this as not a bug soon

Okay,

Doing a
pacman -Rddncs gnome-sharp
pacman -S gnome-sharp

Does not solve the problem. However, reinstalling all the packages that gnome-sharp is providing solves the problem of building monodevelop 2.6 beta. Since the issue started occurring after an update, something must be wrong with the update-script or something?

no