ArcGIS Pro 2.6 API Reference Guide
PageChangedEvent Class
Members  Example 

ArcGIS.Desktop.Layouts.Events Namespace : PageChangedEvent Class
Occurs when a page property of Layout is changed.
Object Model
PageChangedEvent ClassSubscriptionToken ClassSubscriptionToken Class
Syntax
Remarks
Reference PageEventArgs to get a list of arguments.
Example
//Report the event args when a layout page properties are changed.

ArcGIS.Desktop.Layouts.Events.PageChangedEvent.Subscribe((args) =>
{
  System.Windows.MessageBox.Show("PageChangedEvent:" +
  Environment.NewLine +
  "   arg Layout: " + args.Layout.Name +
  Environment.NewLine +
  "   arg New CIMPage (height): " + args.NewPage.Height.ToString() +
  Environment.NewLine +
  "   arg Old CIMPage (height): " + args.OldPage.Height.ToString());
});
Inheritance Hierarchy

System.Object
   ArcGIS.Core.Events.EventBase
      ArcGIS.Core.Events.CompositePresentationEvent<TPayload>
         ArcGIS.Desktop.Layouts.Events.PageChangedEvent

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

PageChangedEvent Members
ArcGIS.Desktop.Layouts.Events Namespace