Can't auto-detect boundary. The layers selected contain data that may make the Toposurface look incorrect. For better results, try selecting only those layers that contain relevant 3D info.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId DifferentEntityTypes { get; }