This section highlights the realtime resources available for .NET / C# developers.

Realtime .NET/C# Libraries

SignalR: Incredibly simple real-time web for .NET  – ASP.NET SignalR is a library for ASP.NET developers that makes it incredibly simple to add real-time web functionality to your applications. What is “real-time web” functionality? It’s the ability to have your server-side code push content to the connected clients as it happens, in real-time.

ASP.NET Core SignalR: Incredibly simple real-time web for ASP.NET Core  – ASP.NET Core SignalR is a new library for ASP.NET Core developers that makes it incredibly simple to add real-time web functionality to your applications. What is “real-time web” functionality? It’s the ability to have your server-side code push content to the connected clients as it happens, in real-time. You can watch an introductory presentation here – Introducing ASP.NET Core Sockets.  This project is part of ASP.NET Core. You can find samples, documentation and getting started instructions for ASP.NET Core at the Home repo.

Awesome Dotnet: A collection of awesome .NET libraries, tools, frameworks and software – A collection of awesome .NET libraries, tools, frameworks, and software.

.NET Websocket-Manager: Real-Time library for ASP .NET Core – This is an Asp .Net Core middleware that provides real-time functionality to .NET Core applications. To the core, it is a WebSocket middleware for Asp .Net Core with TypeScript / JavaScript client and .Net Core client that supports the client and the server invoking each others’ methods.

C# C# library for Firebase Realtime Database –  Simple wrapper on top of Firebase Realtime Database REST API. Among others it supports streaming API which you can use for realtime notifications. For Authenticating with Firebase checkout the Firebase Authentication library and related blog post .

Rocket.Chat: A Rocket.Chat realtime managed .Net driver and bot – A Rocket.Chat real-time, managed, .Net driver, and bot.

GTFS Realtime Bindings: .NET GTFS-realtime Language Bindings  – Provides .NET classes generated from the GTFS-realtime Protocol Buffer specification. These classes will allow you to parse a binary Protocol Buffer GTFS-realtime data feed into C# objects.

Spreads: Series and Panels for Real-time and Exploratory Analysis of Data Streams – Spreads is an ultra-fast library for complex event processing and time series manipulation. It could process tens of millions items per second per thread – historical and real-time data in the same fashion, which allows to build and test analytical systems on historical data and use the same code for processing real-time data.

OpenRA: Open Source real-time strategy game engine  – A Libre/Free Real Time Strategy game engine supporting early Westwood classics, such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

CompBench: Benchmark for native C# realtime compression libraries  – This is a tiny benchmark program I wrote a couple years ago for my personal use. It generates a few data files and feeds them to different compression libraries to measure compression ratio and speed.

How to add Real-time Data to your .NET Application


  • Author: Bitovi, Brian Moschel
  • April 2017



Web applications have increasingly turned to real-time data to provide more dynamic and useful features – for example chat, collaborative editing, and real-time analytics. This trend is evident in the .NET world. While .NET is great, real-time .NET is even better.

Similar to the popularity of AJAX leading to more single-page applications and fewer page refreshes, the recent addition of WebSockets and similar real-time protocols in mainstream browsers has lead to more real-time data connections and less “request data on page load and force the user to refresh if they want updated data” applications.

In this article, you’ll learn a simple way to add real-time functionality to your .NET application. The article will introduce two technologies — SignalR on the server and can-connect-signalr on the client — which make setting up real-time connections both simple and quick. We’ll show how to use both of these libraries by making a simple chat application.

Real-Time Web Apps and .NET. What are your options?


  • Author: Nexmo, Phil Leggetter
  • May 2016



So many applications now offer some form of real-time UX and real-time functionality is becoming increasingly essential as technology trends evolve. Notifications and activity streams in Facebook, Twitter, news and sports apps; real-time location tracking in Uber and most other taxi (logistics) apps; real-time collaboration in Google Docs and Microsoft Office 365 online. What sort of experience would chat apps like Slack, HipChat, WhatsApp, Viber or WeChat offer if messaging weren’t instantaneous? And you can be sure that bots will be powered by real-time technologies.

So, in order to meet user expectations and deliver innovative solutions that align with technology trends, you’re going to need to make use of real-time technologies.

If you build your apps using a .NET stack and you want to add real-time communications functionality to a .NET web app, what considerations should you take into account when choosing a real-time solution? What .NET frameworks or solutions exist? Should you restrict yourself to .NET? If not, how do you integrate with another technology?

Real-time applications using ASP.NET Core, SignalR & Angular


  • Author: Christos Sakell
  • October 2016



SignalR has been out for a long time but ASP.NET Core and Angular 2 aren’t. On this post we ‘ll see what takes to bind all those frameworks and libraries together and build a Real time application. This is not an Angular tutorial nor a SignalR one. Because of the fact that the final project associated to this post contains code that we have already seen on previous posts, I will only explain the parts that you actually need to know in order to build a real time application. And this is why I will strongly recomend you to download the Live-Game-Feed app and study the code along with me without typing it. Here’s what we ‘ll see in more detail..

Realtime Infrastructure Services

  • Realtime API Infrastructure – Realtime API infrastructure specifically allows developers to build realtime data push into their existing APIs.  Typically, you would not need to modify your existing API contracts, as the streaming server would serve as a proxy. The proxy design allows these services to fit nicely within an API stack. This means it can inherit other facilities from your REST API, such as authentication, logging, throttling, etc. It can be combined with an API management system.  In the case of WebSocket messages being proxied out as HTTP requests, the messages may be handled statelessly by the backend. Messages from a single connection can even be load balanced across a set of backend instances.
    • Fanout/Pushpin – Fanout is a real-time API development kit that helps you push data to connected devices easily. Fanout is a cross between a reverse proxy and a message broker. Pushpin is the open source version.
    • – a SaaS API proxy tool that converts standard API requests into a streaming API. In other words, it provides a proxy as a service for any HTTP API by polling and acting as a streaming API.
    • LiveResource – LiveResource is a protocol specification and JavaScript reference library for receiving live updates of web resources. It has the following principles:
  • Realtime Application Infrastructure – Realtime app infrastructure sends data to browsers and clients. It typically uses pub/sub messaging, webhooks, and/or websockets — and is separate from an application or service’s main API.
    • Firebase – Firebase is a BaaS (Backend-as-a-Service) that allows developers to create web applications with no server-side programming required.
    • Pubnub – PubNub is a programmable Data Stream Network (DSN) and realtime infrastructure-as-a-service (IaaS) company. Primarily, they are a messaging solution hosted on a cloud service that allows developers to publish data instantly to one or multiple devices.
    • Pusher – Pusher is a hosted service that allows developers to add realtime bi-directional functionality via WebSockets (with HTTP-based fallbacks) to the web and mobile apps.
    • Ably – Ably is a realtime data delivery platform that provides creators the tools to create, deliver, and manage projects. Their main realtime functionality consists of pub/sub, presence, authentication, encryption, and connection state recovery.