Adding Button in StatusBar !

No guys, nothing seems to be working.

I tried this:

            DockPanel myDockPanel = new DockPanel();
            myDockPanel.LastChildFill = true;


            this.statusBar = new System.Windows.Controls.Primitives.StatusBar();
            DockPanel.SetDock(this.statusBar, System.Windows.Controls.Dock.Bottom);
            myDockPanel.Children.Add(this.statusBar);
       
            this.canvasPanel.Children.Add(myDockPanel);

and This as well:

           this.statusBar.SetValue(DockPanel.DockProperty, System.Windows.Controls.Dock.Bottom);

But the status bar keeps appearing on top left corner!!!