ArcGIS Pro 2.7 API Reference Guide
IsUnknown Property (SpatialReference)

ArcGIS.Core.Geometry Namespace > SpatialReference Class : IsUnknown Property
Gets if this is the unknown coordinate system.
Syntax
public bool IsUnknown {get;}
Public ReadOnly Property IsUnknown As Boolean
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

SpatialReference Class
SpatialReference Members