Honestly, the people that shit on C# as a Microsoft product are just as bad as the Microsoft Fanboys. It's an asinine position.

Point at the objective reasons to use it such as first party frameworks, being incredibly stable and having some of the best devex and performance in the ecosystem. There are many reasons to use this, especially for large performance orientated, cross platform, long term stable applications.

It's a FOSS language anyways, the majority contributions aren't even from Microsoft employees, seeing crazy high levels of community contributions.... Its also supported by a legally separate entity from Microsoft themselves.