Curated list of other solutions (not limited to C#) https://github.com/xiamx/awesome-sentiment-analysis

Paper at http://comp.social.gatech.edu/papers/icwsm14.vader.hutto.pdf

Any benchmarks ?

This is crucial. There are a LOT of companies selling social media sentiment analysis tooling, mostly wrapped up in web apps and large monthly subscription fees.

When I've seen teams do manual classification to test out the accuracy of their tools, it has turned out that the accuracy is generally all around horrible, most tools heavily bias towards "neutral" which really means "not sure". Not too surprising, tweets doesn't provide much context.

From the python, looks like it uses a series of local text file https://github.com/cjhutto/vaderSentiment

Are there any resources to get Vader running with German lexica?

I seems it cannot support other languages out of the box as some language depend stuff are hardcoded : https://github.com/codingupastorm/vadersharp/blob/master/Vad...

Also all the capitalization logic has meaning only in languages that use a bicameral script.

Why? Out of curiosity.

The title seems to have changed from something like "now it is rewritten from Python to C#". I now suppose all the downvotes of my comment happened after the retitling.

Why is it a "sad day" exactly?

It's like investing energy to switch from "My app runs on Kubernetes" to "My app runs on Windows XP" and being proud about it for unexplainable reasons.

It's actually not like that at all since C# is a lively, rapidly evolving platform and also probably friendlier to a large codebase than Python (and almost certainly more performant).

And how good is it at avoiding a large code base?

I don't think good C# code is actually much more verbose than Python unless you're stuck on a very old version.

It is compatible with F# which it pretty expressive and have a nice and clean syntax.