Nested class: Cannot access non-static field in static context

Question

I have a class C with some internal variables. It has a nested class N that wants to access the variables in C. Neither C nor N are static, although C has some static method

Answer 1

This isn't Java, and you don't have inner classes.

An instance of a nested class is not associated with any instance of the outer class, unless you make an association by storing a reference (aka handle/pointer) inside the constructor.

public sealed partial class C
{
    string _t;

    class N
    {
        readonly C outer;

        public N(C parent) { outer = parent; }

        void m()
        {
            outer._t = "fie"; // Error is gone
        }
    }
}