Re: portabilty with Windows and Linux

Juan José wrote:

The imported type `Gtk.Window' is defined multiple times(CS0433)

...
What should be the problem???

It seems that you are using TWO (or more versions) versions of gtk-sharp at the same time. Thats why Gtk.Window is defined more than once.
Check your assemblie references to see if you have checked two different Versions of Gtk.

I have no MonoDevelop right now. That's why I can't make more detailed advices. But I hope you are able to find it nontheless.