Question 1

How do I set up SignalR for a real-time chat in ASP.NET Core?

Accepted Answer

Install the Microsoft.AspNetCore.SignalR NuGet package, create a Hub class to handle messages, and use the @aspnet/signalr npm package on the client to connect and send/receive updates via JavaScript or TypeScript.

Question 2

SignalR vs WebSockets directly, which is better for .NET apps?

Accepted Answer

SignalR abstracts WebSocket management with automatic fallbacks and simplifies real-time implementation in ASP.NET Core, whereas raw WebSockets require manual handling but offer more control. For most .NET projects, SignalR saves development time.

Question 3

Can SignalR work with Vue.js or Angular frontends?

Accepted Answer

Yes, SignalR's JavaScript client is framework-agnostic. Install the @aspnet/signalr package and use it within Vue.js or Angular components to establish connections and listen for server events.

Question 4

How to scale SignalR for high traffic applications?

Accepted Answer

Use backplanes like Redis or Azure SignalR Service to distribute connections across multiple servers, as SignalR is designed for scalability within ASP.NET Core's infrastructure, handling many concurrent users.

Question 5

What are the fallback protocols if WebSockets fail?

Accepted Answer

SignalR automatically falls back to Server-Sent Events (SSE) or long polling when WebSockets are unavailable, ensuring connectivity in restrictive network environments, as mentioned in the WebSocket support feature.

Question 6

Is SignalR free to use and open source?

Accepted Answer

Yes, SignalR is open-source and part of the ASP.NET Core framework, free for commercial use. However, scaling with services like Azure SignalR may incur costs.

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