ArcGIS Pro 2.7 API Reference Guide
LayoutAddedEvent Class
Members  Example 

ArcGIS.Desktop.Layouts.Events Namespace : LayoutAddedEvent Class
Occurs when a Layout is added to the project.
Object Model
LayoutAddedEvent ClassSubscriptionToken ClassSubscriptionToken Class
Syntax
Remarks
This event will be called if a layout is manually inserted using the UI, copied and pasted into a project, or if a layout is imported from another file. Reference LayoutAddedEventArgs to get a list of arguments.
Example
//Report the event args when a layout is added.

ArcGIS.Desktop.Layouts.Events.LayoutAddedEvent.Subscribe((args) =>
{
  System.Windows.MessageBox.Show("LayoutAddedEvent:" +
    Environment.NewLine +
    "   arg Layout: " + args.Layout.Name);
});
Inheritance Hierarchy

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

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

LayoutAddedEvent Members
ArcGIS.Desktop.Layouts.Events Namespace