C# 使用其他控件作为内容在mahapps metro中转换内容

我可以只使用textblock作为mahapps metro中转换控制的唯一内容吗。我试过这个，但不例外。我不是wpf专家。有人能指出这有什么不对吗？这就是我尝试过的

    StackPanel sp = new StackPanel();
    Image imgx  = new Image();
    Image imgy = new Image();
    TextBlock tb = new TextBlock();
            if (x == 1)
        {
            x = 0;
            tb.Text = "X = 1";
            imgy.Visibility = Visibility.Hidden;
            imgx.Visibility = Visibility.Visible;
            var uriSource = new Uri("images/blank-cd.png.png", UriKind.Relative);
            imgx.Source = new BitmapImage(uriSource);
            sp.Children.Add(imgx);
            sp.Children.Add(tb);
            SecondcustomTransitioning.Content = sp;
        }
        else if (x == 0)
        {
            x = 1;
            tb.Text = "X = 1";
            imgx.Visibility = Visibility.Hidden;
            imgy.Visibility = Visibility.Visible;
            var uriSource = new Uri("images/placeholder_person.gif", UriKind.Relative);
            imgy.Source = new BitmapImage(uriSource);
            sp.Children.Add(imgy);
            sp.Children.Add(tb);
            SecondcustomTransitioning.Content = sp;
        }

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删除所有这些内容并使用适当的XAML。@HighCore您的意思是，XAML中的模板选择器？可能与