ArcGIS Pro 2.6 API Reference Guide
IsPrimary Property

ArcGIS.Core.CIM Namespace > CIMProfileOIS Class : IsPrimary Property
Gets or sets a value indicating whether the surface is primary. If surface is primary it can't be hidden and terrain and obstacles will be drawn based on the primary surface.
Syntax
public bool IsPrimary {get; set;}
Public Property IsPrimary As Boolean
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

CIMProfileOIS Class
CIMProfileOIS Members