如何在wpf中检测ContentControl中的选定项

// XAML中的ContentControl定义
<ContentControl x:Name="myContentControl" SelectionChanged="myContentControl_SelectionChanged">
    <RadioButton x:Name="option1" Content="选项1" IsChecked="True" />
    <RadioButton x:Name="option2" Content="选项2" />
    <RadioButton x:Name="option3" Content="选项3" />
</ContentControl>

// 后台代码中的事件处理方法
private void myContentControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    // 遍历ContentControl的子元素，找到选定的选项
    foreach (RadioButton radioButton in FindVisualChildren<RadioButton>(myContentControl))
    {
        if (radioButton.IsChecked == true)
        {
            // 找到选定的选项
            string selectedOption = radioButton.Content.ToString();
            // 进行相应的处理
            break;
        }
    }
}

// 辅助方法，用于遍历VisualTree找到指定类型的子元素
private static IEnumerable<T> FindVisualChildren<T>(DependencyObject dependencyObject) where T : DependencyObject
{
    if (dependencyObject != null)
    {
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(dependencyObject); i++)
        {
            DependencyObject child = VisualTreeHelper.GetChild(dependencyObject, i);
            if (child != null && child is T)
            {
                yield return (T)child;
            }

            foreach (T childOfChild in FindVisualChildren<T>(child))
            {
                yield return childOfChild;
            }
        }
    }
}