如何使用CSS拖动样式在Webview2 + WPF中创建无框架的可拖动窗口

<style>
    .draggable {
        -webkit-app-region: drag;
        cursor: move;
    }
</style>

<div class="draggable">
    <!-- 标题栏内容 -->
</div>

using Microsoft.Web.WebView2.Core;
using Microsoft.Web.WebView2.Wpf;

...

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        webView.EnsureCoreWebView2Async(null);
        webView.CoreWebView2InitializationCompleted += WebView_CoreWebView2InitializationCompleted;
    }

    private void WebView_CoreWebView2InitializationCompleted(object sender, CoreWebView2InitializationCompletedEventArgs e)
    {
        webView.CoreWebView2.SetUserAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36");
    }
}