NetExposureLimit

public decimal? MaxNotional { get; set; }

value = netExposureLimit.MaxNotional
netExposureLimit.MaxNotional = value

What the uncovered position may be worth before it is closed, or when the instrument is capped by volume alone. Answers only while a price is known.

public decimal MaxVolume { get; set; }

value = netExposureLimit.MaxVolume
netExposureLimit.MaxVolume = value

The absolute volume of the uncovered position that may be carried. Anything past it is closed.