The NuGet package for OneNote is required
    
/*
// See https://aka.ms/new-console-template for more information
Console.WriteLine("Hello, World!");
*/

/*
// Hello World! program https://davetallett26.github.io/roslyn.html
namespace HelloWorld
{
    class Hello
    {
        static void Main(string[] args)
        {
            System.Console.WriteLine("Hello World!");
            System.Console.ReadKey(true);
        }
    }
}
*/

using Microsoft.Office.Interop.OneNote;
using OneNote = Microsoft.Office.Interop.OneNote;
// https://learn.microsoft.com/en-us/office/client-developer/onenote/application-interface-onenote
//static void GetEntireHierarchy()
class Program
{
    static void Main(string[] args)
    {
        String strXML;
        var onApp = new OneNote.Application();
        onApp.GetHierarchy(null, HierarchyScope.hsNotebooks, out strXML, XMLSchema.xs2013);
        Console.WriteLine(strXML);
    }
}