如何使用WPF实现无边框窗口？

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow"
        WindowStyle="None"
        ResizeMode="CanResizeWithGrip"
        Background="Transparent">
    <Grid>
        <!-- 在此处添加您的控件和布局 -->
    </Grid>
</Window>

using System;
using System.Windows;
using System.Windows.Input;

namespace WpfApp
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            DragMove();
        }
    }
}

        PreviewMouseLeftButtonDown="OnMouseLeftButtonDown">
    ...
</Window>