ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMHatchFill Class / Rotation Property

Rotation Property (CIMHatchFill)
Gets or sets the angle of rotation for all the strokes, in degrees.
Syntax
public double Rotation {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also