WPF 绑定之静态与非静态属性更改

<Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <StackPanel >
            <Label Content="{Binding myClassA.myString}"/>
        </StackPanel>

        <StackPanel Grid.Row="1" >
            <StackPanel.DataContext>
                <!--该Grid所有绑定都是绑定到ClassA里面的属性-->
                <local:ClassA/>
            </StackPanel.DataContext>
            <Label Content="{Binding myLabel}"/>

            <!--绑定到ClassA里面myLabel字符串属性-->
            <Button x:Name="myButton" Content="ButtonA" Click="ButtonA_Click" />
            <!--在MainWindow.xaml.cs后台文件中执行按键单击事件，单击事件就是改变ClassA中的myLabel属性同时在界面上显示出更改的信息-->
        </StackPanel>
    </Grid>

using System;
using System.ComponentModel;

namespace WpfApp1
{
    public class ClassA : INotifyPropertyChanged
    {
        private static string label = "静态字符";
        public static string myLabel
        {
            get { return label; }
            set
            {
                label = value;
                StaticPropertyChanged?.Invoke(null, new PropertyChangedEventArgs(nameof(myLabel)));//异步更新静态属性
            }
        }
        public static event EventHandler<PropertyChangedEventArgs> StaticPropertyChanged;//静态事件处理属性更改

        private  string str = "非静态字符";
        public  string myString
        {
            get { return str; }
            set
            {
                str = value;
                OnPropertyChanged("myString");//异步更新非静态属性
            }
        }
        
        public event PropertyChangedEventHandler PropertyChanged;//非静态属性更改
        protected virtual void OnPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

using System.Windows;

namespace WpfApp1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public ClassA myClassA { get; set; } = new ClassA();
        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;
        }

        private void ButtonA_Click(object sender, RoutedEventArgs e)
        {
            ClassA.myLabel = "更改绑定静态字符";
            myClassA.myString = "更改绑定非静态字符串";
        }
    }
}