ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / SpatialReference Class / IsProjected Property
Example Version

IsProjected Property (SpatialReference)
Gets if this is a projected coordinate system.
Syntax
public bool IsProjected {get;}
Example
Use WGS84 SpatialReference
SpatialReference wgs84 = SpatialReferences.WGS84;
bool isProjected = wgs84.IsProjected;     // false
bool isGeographic = wgs84.IsGeographic;   // true
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also