ArcGIS Pro 2.6 API Reference Guide
IsVisible Property (PropertySheet)

ArcGIS.Desktop.Framework Namespace > PropertySheet Class : IsVisible Property
Gets boolean value of true if any property sheet is currently visible.
Syntax
public static bool IsVisible {get;}
Public Shared ReadOnly Property IsVisible As Boolean
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

PropertySheet Class
PropertySheet Members