Is it possible to insert a text block into an image on runtime?

<window x:class="MyProject.MainWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <grid name="mygrid">

    </grid>
</window>

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

      mygrid.Children.Add(
         new System.Windows.Controls.Frame() {
            Background = Brushes.Tomato });
      mygrid.Children.Add(
         new System.Windows.Controls.TextBlock() {
            Text = "Here goes my text",
            Margin = new Thickness(50, 50, 0, 0) });
   }
}