namespace pythonnet_testing {

  public class Bar {

    public string MethodInBaseClass() {
      return "hello";
    }

    public class Hej : Bar {
    }
  }

  public class Foo {
    public Bar Bar;

    public static Foo Create() {
      Foo f = new();
      f.Bar = new Bar.Hej();
      return f;
    }
  }

  class Program {
    static void Main(string[] args) {

      var pyCode = @"
import pythonnet_testing
f = pythonnet_testing.Foo.Create()
print('Trying to access member of nested subclass')
_ = pythonnet_testing.Bar # NOTE: The python code crashes unless this explicit reference to the Bar class is used
print(f'Bar: {f.Bar}')
print(f'Method call: {f.Bar.MethodInBaseClass()}')

      ";

      PythonEngine.Initialize();

      using (Py.GIL()) {
        PythonEngine.Exec(pyCode);
      }
    }
  }

    public class Hej : Bar {
      public new string MethodInBaseClass() => base.MethodInBaseClass();
    }