What is pub/sub and how to apply it in C# .NET to build a chat app

In this tutorial, we discussed the Publish/Subscribe (pub/sub) pattern and how it can be applied in a .NET 6 console app to create a chat application. We covered what pub/sub is, when to use it, its benefits for .NET applications, and how to use Ably's .NET SDK to implement the pattern. The tutorial provided step-by-step instructions on creating a chat program in a .NET 6 console application using Ably's protocol for pub/sub. It also explained additional features offered by Ably, such as history, presence, and push notifications, which can be used to provide richer functionality to applications. By the end of this tutorial, readers should have a good understanding of the pub/sub pattern and how it can be applied in their .NET applications using Ably's SDK.