ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Geometry Namespace / DatumTransformation Class / InputSpatialReference Property

InputSpatialReference Property (DatumTransformation)
Gets the input spatial reference of this transformation.
Syntax
public virtual SpatialReference InputSpatialReference {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.3 or higher.
See Also