ArcGIS Pro 2.7 API Reference Guide
Broadcast Class
Members 

ArcGIS.Desktop.Framework.Utilities Namespace : Broadcast Class
Class used for communicating between multiple instances of Pro using a publish/subscribe model. Messages are organized around a uniquely named channel. Subscribers can limit what messages they receive by subscribing to a specific channel. Publishers specify a channel when posting messages. Calling publish when fewer than two instances of Pro are running will produce no messages.
Syntax
public static class Broadcast 
Public MustInherit NotInheritable Class Broadcast 
Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Framework.Utilities.Broadcast

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

Broadcast Members
ArcGIS.Desktop.Framework.Utilities Namespace