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

Rotation Property (CIMAnimationScreenGraphicKeyframe)
Gets or sets the angle of rotation (in degrees) for the graphic. It applies only to the animation screen graphic that contains a polygon graphic.
Syntax
public double Rotation {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.5 or higher.
See Also