C# Reflection help needed

 public partial class BaseClass : Form
{
    private bool myBaseBool;
    private NewClass newClass = new NewClass();

    public BaseClass()
    {
        InitializeComponent();
    }

    private void Button1_Click(object sender, EventArgs e)
    {
        ChildClass childC = new ChildClass();
        newClass.NewClassInt = 50;
        childC.RunTest();
        bool testBool = myBaseBool;
    }

    private void DoSomething(int number, string text)
    {
        int i = number;
        string s = text;
    }
}

public class NewClass
{
    public int NewClassInt = 10;
}

public class ChildClass : BaseClass
{
    public void RunTest()
    {
        //Test one setting base class private testBool ------ Working
        var myObj = this;
        var myField1 = typeof(ChildClass).BaseType.GetField("myBaseBool", BindingFlags.Instance | BindingFlags.NonPublic);
        myField1.SetValue(myObj, true);
        ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

        // Test two invoking base class private method -------- Working
        object[] ob = {1, "test"};
        typeof(ChildClass).BaseType.GetMethod("DoSomething", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(myObj, ob);
        //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

        //Test three get value from base class instance of NewClass -------- Not Working
        var myField2 = typeof(ChildClass).BaseType.GetField("newClass", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
        var value = ((NewClass) myField2.GetValue(myObj)).NewClassInt;//Always gets the default value of NewClass
    }
}

}

Why is test three returning the default NewClassInt value and not returning the base class instance NewClassInt value?

Please no "why do you want to do that questions" I seen enough of them when it comes to the subject Reflection. All I'm doing is trying to learn.