The interesting case is the Common Language Runtime, not C#.

> More than 20 programming tools vendors offer some 26 programming languages — including C++, Perl, Python, Java, COBOL, RPG and Haskell — on .NET.

https://news.microsoft.com/source/2001/10/22/massive-industr...

MSIL thus had to support all of them.

Those differences between language semantics is why CLS was also a thing back then.

https://learn.microsoft.com/en-us/dotnet/standard/language-i...