C# is not a better Java by any means, Java has a more diverse and greater ecosystem, you have plenty of choice for tooling, IDEs, libraries, platforms, etc... With C# you are pretty much stuck with Microsoft which everyone knows what that means (.net core runs everywhere, but still attached to msft in many ways), if you are serious about the C# ecosystem, you need to use Windows, C# IDEs outside of visual studio are mediocre at best. If you like running a operating system that doesn't give a f** about your privacy and developing for that platform then sure. There is a reason why C# (even with Msft huge lobbying efforts, not only to the goverments but to dev communities) have been relegated to boring(and sometimes dying) industries which get huge discounts for using Azure.

EDIT: typos