ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Editing Namespace / AnnotationProperties Class / TextCase Property

TextCase Property (AnnotationProperties)
Gets and sets the letter case used to draw the annotation.
Syntax
public Nullable<TextCase> TextCase {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.2 or higher.
See Also