An expression evaluating to an object of type McFeatures.
FeatureIndex
Optional. A Long value.
The index of the feature for which the signature is desired, or -1 for a signature of all features combined.
Remarks
Property changed notifications are sent when any feature changes, but there are some cases where it must be determined if a particular feature is still the same as it was before the property change. The Signature can be used to detect quickly if a feature has changed from some earlier state.
The computed Signature value depends only on the coordinates of the feature(s); it does not depend on the OptionFlags or on the FeatureStatusFlags.
Signature Property (McFeatures)
