WPF依赖项属性不需要包装属性也可以工作

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace Wpf180706
{
    public class Student:DependencyObject
    {
 public static readonly DependencyProperty NameProperty = DependencyProperty.Register("Name",typeof(string),typeof(Student));

    }

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Wpf180706
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
             Binding b = new Binding();
            b.Path = new PropertyPath("Text");
            b.Source = txt;
            BindingOperations.SetBinding(s, NameProperty, b);//Student对象的依赖项属性绑定到文本的Text属性
        }
        Student s = new Student();
        private void btn_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show(s.GetValue(NameProperty).ToString());
        }
    }
}