Almost 500 different talks and not a single one which involves .NET or C#.
If anything, the .NET community should show up more on this kind of conferences.
It's a stack they keep asking for and keep missing right under their nose. So the way FOSDEM presentations look like is not surprising. Sure, why do that when we can instead talk about Gleam which is a very good language if you really like how bitcoin mining was friendly to our ecology.
There are a great many companies and developers in the .NET orbit.
I agree there is still a certain bifurcation between the Microsoft and traditional FOSS worlds in terms of conferences etc. But I'm not sure either needs to convert the other.
Quite common in many circles that haven't kept up with .NET, nor are the kind of people to waste their lives in places like HN, Reddit, or spend evenings and weekends coding the next great app in Github.
Many of these people do hold management positions, and will favour non-M$ technologies for their company.
Yes I wrote M$ on purpose to stress the company culture.
https://devblogs.microsoft.com/dotnet/net-and-typescript-at-...
Some people should really try to take an objective look at C# and .net and decide about its merit, separately from the company that developed it. I know the latter also plays a role in the decision to invest in technology, but most of modern .net is open source with MIT license.