gtk-sharp 2.10.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. An enumeration for determining where a dropped row goes. System.Enum GLib.GType(typeof(Gtk.TreeViewDropPositionGType)) Field Gtk.TreeViewDropPosition Drop before this row. Field Gtk.TreeViewDropPosition Drop after this row. Field Gtk.TreeViewDropPosition Drop as a child of this row (with fallback to before if into is not possible). Field Gtk.TreeViewDropPosition Drop as a child of this row (with fallback to after if into is not possible).