[Gtk-sharp-list] Using gtk# 1.9.1 and FileChooserDialog

[Raúl Moratalla]

Hello, I am developing an application that currently uses Gtk#1 and I would 
like to use Gtk# 1.9.1.
I am using monodevelop and I replaced the reference of gtk#1.0.5 with the new 
that I compiled and installed on my system with version 1.9.1
The problem is that I'm not able to FileChooserDialog I get the following 
error:

Cannot find type `Gtk.FileChooserDialog'(CS0246)

I added gtk-sharp.dll as an assembly but this didn't the problem
It seems that still I'm using gtk# 1.05

How could I solve this?