MQTTnet VS MoreLINQ

MQTT https://github.com/dotnet/MQTTnet

MQTTNet - High perf IOT comms for .NET - https://github.com/dotnet/MQTTnet

I'm trying to use MQTT.Net and so far everything works.. except for event handling.

Like the other guy said it depends on the requirements, but you could implement your own mqtt server with MQTTnet with a few lines of code

For the server we used mosquitto because we already used it in the past (and it's relatively simple), for the client MQTTnet because it's .net and it seemed good enough (mosquitto has a client library too but it's C so I'd have to write some interop). It's a simple protocol so it shouldn't really matter which implementation you use.

We are going to use MQTTNet as the foundation for this article, although the same concepts can be applied with any other MQTT client.

[2] https://github.com/dotnet/MQTTnet

For example, I used MQTTnet which is a very nice (high performance & extensible) library. And it's free/open source. If you're not writing your server code in .NET, then look for whatever broker libraries are available on your server platform.

You can grab MoreLinq off of Nuget for pre-.NET6 and it has a DistinctBy implementation that you might be able to use: https://github.com/morelinq/MoreLINQ

Install "morelinq" 3.3.2 from Nuget: https://www.nuget.org/packages/morelinq You know you got the right one if it has about 37.2 million downloads.

If you don't already know about it, I highly recommend checking out the MoreLINQ open source project which adds a bunch of these less common but still occasionally useful extensions to LINQ. They also include an Index method which does exactly what your WithIndex method does, yielding out KeyValuePair entries for each iteration.

yield return is a significant core piece of the framework. It's the basis of which most deferred execution and LINQ is built upon and any extension one would want to add to LINQ. (for example)

For a time, I'd say the Query Syntax was comparatively as popular as the Method Syntax. But over the years as LINQ became ubiquitous for working with non-database queries (LINQ-to-Objects) and more users extended them (for example, MoreLinq) the Method Syntax became more popular. I'd say nowadays the Query Syntax is relatively rare to see and perhaps mostly limited to direct database queries or these scenarios like "join" that are easier.

I suggest morelinq https://github.com/morelinq/MoreLINQ

If you don't already know about it, take a gander at the MoreLINQ extensions. I don't think it solves this particular problem, but it's a great example of extending LINQ.

It's part of the MoreLinq library. The Window() function code is here.