ASP.NET Core SignalR is an open source library for ASP.NET Core developers that makes it extremely simple to add real-time web functionality, ability for server-side code to push content in real-time, to the connected clients. As a result, clients are updated without polling the server, or submitting a new HTTP request for updates.
Real-time technologies have become integral part of many the applications today. This need can easily be sorted out using Azure SignalR Service. The Azure SignalR Service is an Azure service based on ASP.NET Core SignalR. Microsoft Azure SignalR Service is currently in Public Preview.