private static bool RotateDisplay(string displayName, ref DEVMODE dm, DMDO orientation) {
static bool IsLandscape(DMDO value) => (value == DMDO.DMDO_DEFAULT) || (value == DMDO.DMDO_180);
static bool IsLandscape(DMDO value) => (value is DMDO.DMDO_DEFAULT or DMDO.DMDO_180);