C#WPF设计一个动态时钟显示

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.Windows.Threading;

namespace WpfApp1
{
    /// 

    /// Interaction logic for MainWindow.xaml
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            //实例化timer
            DispatcherTimer timer = new DispatcherTimer();
            //设置每隔一秒触发
            //TimeSpan--时间间隔
            timer.Interval =TimeSpan.FromSeconds(1);
            timer.Tick += Timer_Tick;
            timer.Start();  
        }

        private void Timer_Tick(object? sender, EventArgs e)
        {

            this.timeTextBox.Text = DateTime.Now.ToString();   
        }
    }
}