I’m trying to use the ignore case option for Contains, and I get this error:

CS1501  No overload for method 'Contains' takes 2 arguments 

This is the code line:

item.buildMach.Contains("co.net", StringComparison.CurrentCultureIgnoreCase)

Hovering over Contains, intellisense does say it has 2 overloads, and it looks like it knows it has this second arg.

I’m trying to do what Mathieu Renda has in his solution for this: contains – ignore case

What do I need to do to fix this error and use the ignore case?

This project has target framework of .net framework 4.7.2.