This .NET class wraps the AcDbDynBlockReferenceProperty::UnitsType ObjectARX enum. 

Describes the units (if any) of the property. Clients can use this information to format the property in their user interface.

Public Enum DynamicBlockReferencePropertyUnitsType
  NoUnits
  Angular
  Distance
  Area
End Enum

public enum DynamicBlockReferencePropertyUnitsType {
  NoUnits,
  Angular,
  Distance,
  Area
}