ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Framework Namespace / PropertySheet Class / Cancel Method

Cancel Method (PropertySheet)
Closes the property sheet and discards any edits.
Syntax
public static void Cancel()
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also