gdk-sharp2.12.0.0Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.Specifies the visiblity status of a window for a .System.EnumGLib.GType(typeof(Gdk.VisibilityStateGType))FieldGdk.VisibilityStateThe window is completely visible.FieldGdk.VisibilityStateThe window is partially visible.FieldGdk.VisibilityStateThe window is not visible at all.