ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMGISProject Class / DefaultSpatialReference Property

DefaultSpatialReference Property
Gets or sets a WKT string representation of the default spatial reference of the project.
Syntax
public string DefaultSpatialReference {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also