ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMUniqueValueRenderer Class / VisualVariables Property
Example Version

VisualVariables Property (CIMUniqueValueRenderer)
Gets or sets the visual variables.
Syntax
public CIMVisualVariable[] VisualVariables {get; set;}
Example
Get the attribute rotation field of a layer
var featureLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().FirstOrDefault();
QueuedTask.Run(() =>
{
  var cimRenderer = featureLayer.GetRenderer() as CIMUniqueValueRenderer;
  var cimRotationVariable = cimRenderer.VisualVariables.OfType<CIMRotationVisualVariable>().FirstOrDefault();
  var rotationInfoZ = cimRotationVariable.VisualVariableInfoZ;
  var rotationExpression = rotationInfoZ.ValueExpressionInfo.Expression; // this expression stores the field name  
});
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also