private void LoadFromFile(string fileName)
 {
     if (System.IO.File.Exists(fileName))
     {
         XmlDocument xmlDoc = new XmlDocument();
         xmlDoc.Load(fileName);
         XmlElement docEle = xmlDoc.DocumentElement; // element <Posts>
         MyDesignerCanvas.LoadAllPosts(docEle);
     }
 }
 private void OnBlueNoteClicked(object sender, RoutedEventArgs e)
 {
     MyDesignerCanvas.CreateTextPostAt(new Point(50, 50), Colors.LightSkyBlue);
 }
 private void OnYellowNoteClicked(object sender, RoutedEventArgs e)
 {
     MyDesignerCanvas.CreateTextPostAt(new Point(50, 50));
 }
 private void OnPinkNoteClicked(object sender, RoutedEventArgs e)
 {
     MyDesignerCanvas.CreateTextPostAt(new Point(50, 50), Colors.Pink);
 }