Fix Public Inner Class References

[bruce-dunwiddie]

When referencing a variable in an expression whose type is a public inner class the current code is using Type.IsNotPublic instead of !Type.IsPublic, and Type.IsNotPublic also includes public inner classes.

https://docs.microsoft.com/en-us/dotnet/api/system.type.isnotpublic?view=net-5.0

true if the Type is not declared public and is not a nested type; otherwise, false.

So wrapper accessor class code is triggered incorrectly, but not executed successfully because calling code uses Type.IsPublic.

data-eval/Data_Eval/Data_Eval/CodeWriting/CSharpCodeWriter.cs

Line 78 in 2780863

if (variable.Type.IsNotPublic &&

data-eval/Data_Eval/Data_Eval/Evaluator.cs

Line 316 in 2780863

if (variable.Type.IsPublic)