在我有限的经验与winui 3，我不能只删除关闭按钮，然而，它是有可能隐藏整个标题栏区域。

• • 主窗口. xaml. cs**

using Microsoft.UI;
using Microsoft.UI.Xaml;
using Microsoft.UI.Windowing;

namespace WinUI3
{
    public sealed partial class MainWindow : Window
    {
        public MainWindow()
        {
            this.InitializeComponent();

            GetAppWindowAndPresenter();
            _apw.IsShownInSwitchers = false;
            _presenter.SetBorderAndTitleBar(false, false);
        }

        private void myButton_Click(object sender, RoutedEventArgs e)
        {
            myButton.Content = "Clicked";
            this.Close();
        }

        public void GetAppWindowAndPresenter()
        {
            var hWnd = WinRT.Interop.WindowNative.GetWindowHandle(this);
            WindowId myWndId = Win32Interop.GetWindowIdFromWindow(hWnd);
            _apw = AppWindow.GetFromWindowId(myWndId);
            _presenter = _apw.Presenter as OverlappedPresenter;
        }
        private AppWindow _apw;
        private OverlappedPresenter _presenter;
    }
}

这段代码将创建一个没有标题栏的窗口（最小化按钮，最大化按钮和关闭按钮）。