[Netch]

> In C# I can simply do this: "hello world".ToUpper();

Hmm still actual: https://www.moserware.com/2008/02/does-your-code-pass-turkey...

[neonsunset]

> 2008

This is completely irrelevant because culture-sensitive case conversion relies on ICU/NLS.

[Netch]

But at least a programmer shall be aware to call it (whatever API is used).