public static void RubberBandStretcher_CalculateStretch(IntPtr rbs) { if (IntPtr.Size == 8) { RubberBandNativeMethodsx64.RubberBandStretcher_CalculateStretch(rbs); } else { RubberBandNativeMethodsWin32.RubberBandStretcher_CalculateStretch(rbs); } }