Avalonia:如何以编程方式向UserControl添加控件

using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;

public class MyUserControl : UserControl
{
    public MyUserControl()
    {
        InitializeComponent();
        
        Button myButton = new Button();
        myButton.Content = "Click Me!";
        myButton.Click += MyButton_Click;

        StackPanel stackPanel = (StackPanel)this.Content;
        stackPanel.Children.Add(myButton);
    }

    private void MyButton_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
    {
        // 处理按钮点击事件的代码
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }
}