Chapter 3. Introducing SignalR

SignalR is a framework that facilitates building interactive, multiuser, and real-time web applications (although not only web applications, as we shall see later on), making extensive use of asynchrony techniques to achieve immediacy and maximum performance.

Originally, it was a personal project of David Fowler and Damian Edwards, members of the ASP.NET team at Microsoft, but it is now an officially integrated product in the stack of web technologies. Figure 3-1 gives a simplified idea of its position within the ASP.NET stack, where we can see Web Forms, MVC, and Web Pages as frameworks for building web applications and pages, and Web API and SignalR for building services.

Figure 3-1. Conceptual position of SignalR ...

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