ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMSizeVisualVariable Class / Expression Property

Expression Property (CIMSizeVisualVariable)
Gets or sets the expression.
Syntax
public string Expression {get; set;}
Remarks
This property is used for Python or VBScript expressions. Arcade expressions will use the ValueExpressionInfo property.
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also