Проблема с DataContext и привязкой пути в XAML WPF - PathError

Question

Я новичок в WPF и stackoverflow.

Я получил шаблон с пустым текстом. Дано 12 пробелов, но с 1 строкой я не могу получить доступ к вар. Связывание с DataContext.

Я добавил пустой комментарий в качестве комментария, единственная проблема - 7 и 8 в xaml-файле.

Запрещено изменять любой другой код в качестве 12 пробелов. .

Могу ли я иметь ошибку на других пробелах, но кроме метки C (пустые 7 и 8) она работает хорошо.

Thannk

Пробовал в пустом 7:MyObject myObject

blank 8: MyField MyObject.MyField

7 и 8 в различных комбинациях, много использовал Google, но не смог выяснить мою проблему с путем к «myField»

using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace DataBinding
{
    /// <summary>
    /// Code behind of MainWindow.xaml
    /// 
    /// The code of this particular project is intentionally left incomplete
    /// (code-behind as well as XAML). Missing pieces of code are indicated by
    /// markers such as ___1___.
    ///
    /// As an exercise, the missing pieces of code should be identified and
    /// inserted. Do not add additional code. The full program should use data
    /// bindings in order to display 9876543 in each Label once the button
    /// Change is clicked.
    /// </summary>
    public partial class MainWindow : Window
    {
        // Create an instance of class student
        protected MyClass myObject = new MyClass();
        public MyClass MyObject
        {
            get { return myObject; }
            set { myObject = value; }
        }

        public MainWindow()
        {
            InitializeComponent();

            Binding myBinding = new Binding(nameof(MyClass.MyField)); // Binding myBinding = new Binding(___1___);
            myBinding.Source = myObject; // myBinding.Source = ___2___;
            A.SetBinding(Label.ContentProperty, myBinding); // A.SetBinding(___3___, myBinding);

            D.DataContext = myObject; // D.DataContext = ___4___;

            // Tried to fiqure out the root of the Problem
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).Status);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).DataItem);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).Target);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).TargetProperty);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).ResolvedSource);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).ResolvedSourcePropertyName);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).HasError);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).HasValidationError);
            Console.WriteLine(C.GetBindingExpression(Label.DataContextProperty).IsDirty);
            Console.WriteLine(C);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).Status);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).DataItem);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).Target);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).TargetProperty);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).ResolvedSource);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).ResolvedSourcePropertyName);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).HasError);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).HasValidationError);
            Console.WriteLine(C.GetBindingExpression(Label.ContentProperty).IsDirty);
        }

        private void Change(object sender, RoutedEventArgs e)
        {
            myObject.MyField = 98765432;
        }
    }

    /// <summary>
    /// A simple representation of a student's properties.
    /// </summary>
    public class MyClass : INotifyPropertyChanged
    {
        /// <summary>
        /// Constructor, creates an empty object.
        /// </summary>
        public MyClass()
        {
        }

        public event PropertyChangedEventHandler PropertyChanged; // public event PropertyChangedEventHandler ___12___;

        /// <summary>
        /// Raise a PropertyChanged event.
        ///
        /// Should be called after a value change in one of this' properties. 
        /// </summary>
        /// <param name="pname">A string describing the name of the property that has changed.</param>
        protected void RaisePropertyChanged(string pname)
        {
            Console.WriteLine("RAISE " + pname);
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(pname));
            }
        }

        int _MyField = 708312;
        public int MyField
        {
            set
            {
                _MyField = value;
                RaisePropertyChanged(nameof(MyClass.MyField)); // RaisePropertyChanged(___11___);
            }
            get
            {
                return _MyField;
            }
        }
    }
}

<Window x:Class="DataBinding.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="300" Width="300"
        DataContext="{Binding RelativeSource={x:Static RelativeSource.Self}}"> <!-- DataContext="{___5___}"> -->
    <StackPanel>
        <Label Name="A">1234</Label>

        <Label Name="B" Content="{Binding Path=MyObject.MyField}"/>  
        <!-- <Label Name="B" Content="{Binding ___6___}"/> -->

        <Label Name="C" DataContext="{Binding Source=MyClass.MyObject}" Content="{Binding Path=MyField}"/> 
        <!-- <Label Name="C" DataContext="{Binding ___7___}" Content="{Binding ___8___}"/> -->

        <Label Name="D" Content="{Binding Path=MyField}" /> 
        <!-- <Label Name="D" Content="{Binding ___9___}" /> -->


        <Button Click="Change">Change</Button> 
        <!-- <Button Click="___10___">Change</Button> -->
    </StackPanel>
</Window>

При запуске программы я ожидал 4 раза 708312, только получил метки A, B и D, заполненные 708312.