SignalR is an open-source library that simplifies adding real-time web functionality to applications. It allows server-side code to push content to connected clients instantly as it becomes available, rather than having the server constantly polled by the client. SignalR supports a variety of transport mechanisms, automatically selecting the best available option based on the client and server capabilities (e.g., WebSockets, Server-Sent Events, Long Polling). It's commonly used for applications requiring high-frequency updates, such as chat applications, online gaming, dashboards, and real-time monitoring systems.
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