The GPIOPullUpDownModeEnum enum defines the pull up or pull down state of a GPIO. Note that the the values here are significant. These are the values we write to the GPPUD to set the pullUpDown state.
public enum GPIOPullUpDownModeEnum { PULLUPDOWN_OFF =0x0, PULLUPDOWN_DOWN =0x1, PULLUPDOWN_UP =0x2, }