gtk-sharp 2.12.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. The method to use when making the curve. System.Enum GLib.GType(typeof(Gtk.CurveTypeGType)) Field Gtk.CurveType linear interpolation Field Gtk.CurveType spline interpolation Field Gtk.CurveType free form curve