The SiteSubRegion type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | HostId | The element id of the topography surface hosting this SiteSubRegion. |
| IsValidObject | Specifies whether the .NET object represents a valid Revit entity. |
| TopographySurface | The TopographySurface element which this SiteSubRegion represents. |