Calling a method in an embedded Class from the Primary Class

[KGCole]

Hi Everyone. I'm using Visual Studio 2017 and have found an issue in debugging that I need help with. I've embedded a Class in my Primary Class, and have tried to call a method found in that embedded class, but VS gives me an error (a squiggly red line under the name of the method, like it can't be found).

How do I call a method in my embedded Class from my Primary Class? Can someone explain to me why my Primary Class can't "see" the methods in the embedded Class? I'll continue to search through the related articles on this site and other threads to find an answer as well.

The version of .Net I'm using is 4.7.03056. I'm also including a screen print of the Visual Studio app with my code. Thanks!