[Gtk-sharp-list] menuBar and gtk.treeview same GUI

[luca]

Hi all, 
i've to build a desktop application, and i'm using GTK# 
how can i add multiple widget to the same GUI?

best regards,
Luca


MenuBar mainMenu = new MenuBar();
//adding content
this.Add(mainMenu);

Gtk.TreeView tree = new Gtk.TreeView ();
//building tree

this.Add(tree);

where this is mainwindow

(testdialog:3691): Gtk-WARNING **: Attempting to add a widget with type
GtkTreeView to a __gtksharp_0_MainWindow, but as a GtkBin subclass a
__gtksharp_0_MainWindow can only contain one widget at a time; it already
contains a widget of type GtkMenuBar
The application was terminated by a signal: SIGKILL

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