Why am I seeing this unexpected behavior from .NET's StartsWith?

Question

This must be a .NET bug, right?

"KonNy".StartsWith("Kon") returns false, while "KonNy".StartsWith("Ko") and "KonN".StartsWith("Kon") return true.

Is there anything I'm missing here?

Answer 1

Repeated from comments:

I don't know .NET specifically, but I suspected you might observe this phenomenon if StartsWith followed a collation where nny was a single letter, such as Hungarian. If I'm right and if you change your collation to a neutral one, your "bug" would disappear. :)