ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / SimpleRendererDefinition Class / Label Property

Label Property (SimpleRendererDefinition)
Gets or sets the label that will show up on the TOC next the symbol.
Syntax
public string Label {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also