CS8025 C# Feature is not available in C# 4. Please use language version 7 or greater.
It might be helpful if you would share what feature you’re attempting to use.
That said, if it’s not available you can’t use it, so do whatever you’re doing in a different way.
1 Like
Is this some kind of puzzle where we’re supposed to guess what you’re trying to do instead of you just writing it?