Returns the element id of the level that defines the bottom of the underlay range.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0)

Syntax

C#
`public ElementId GetUnderlayTopLevel()`

Visual Basic
`Public Function GetUnderlayTopLevel As ElementId`

Visual C++
`public: ElementId^ GetUnderlayTopLevel()`

See Also