Using BitmapImage objects with Buttons

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//Add the following Using statements
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using System.Windows.Media.Imaging;
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using System.Windows.Controls;
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public class addButton : Indicator
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{
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  // Define a Chart object to refer to the chart on which the indicator resides
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  private Chart chartWindow;
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  // Define a Button
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  private System.Windows.Controls.Button myButton = null;
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  // Instantiate a BitmapImage to hold an image
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  BitmapImage myBitmapImage = new BitmapImage();
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  // Instantiate an ImageBrush to apply to the Button
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  ImageBrush backgroundImage = new ImageBrush();
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  private bool IsToolBarButtonAdded;
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  protected override void OnStateChange()
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  {
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      if (State == State.Configure)
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      {
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          // Assign an image on the filesystem to the BitmapImage.
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           // This example assumes that a jpg image named "ButtonBackground" resides in the install directory
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          myBitmapImage.BeginInit();
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          myBitmapImage.UriSource = new Uri(NinjaTrader.Core.Globals.InstallDir + "ButtonBackground.jpg");
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          myBitmapImage.EndInit();
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          // Assign the BitmapImage as the ImageSource of the ImageBrush
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          backgroundImage.ImageSource = myBitmapImage;
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      }
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      else if (State == State.Historical)
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      {
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          //Call the custom addButtonToToolbar method in State.Historical to ensure it is only done when applied to a chart
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           // -- not when loaded in the Indicators window
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          if (!IsToolBarButtonAdded) AddButtonToToolbar();
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      }
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      else if (State == State.Terminated)
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      {
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          //Call a custom method to dispose of any leftover objects in State.Terminated
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          DisposeCleanUp();
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      }
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  }
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  private void AddButtonToToolbar()
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  {
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      // Use this.Dispatcher to ensure code is executed on the proper thread
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      ChartControl.Dispatcher.InvokeAsync((Action)(() =>
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      {
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          //Obtain the Chart on which the indicator is configured
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          chartWindow = Window.GetWindow(this.ChartControl.Parent) as Chart;
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          if (chartWindow == null)
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          {
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              Print("chartWindow == null");
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              return;
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          }
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          // Create a style to apply to the button
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          Style s = new Style();
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          s.TargetType = typeof(System.Windows.Controls.Button);
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          s.Setters.Add(new Setter(System.Windows.Controls.Button.FontSizeProperty, 11.0));
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          s.Setters.Add(new Setter(System.Windows.Controls.Button.BackgroundProperty, Brushes.Orange));
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          s.Setters.Add(new Setter(System.Windows.Controls.Button.ForegroundProperty, Brushes.Black));
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          s.Setters.Add(new Setter(System.Windows.Controls.Button.FontFamilyProperty, new FontFamily("Arial")));
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          s.Setters.Add(new Setter(System.Windows.Controls.Button.FontWeightProperty, FontWeights.Bold));
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          // Instantiate the Button
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          myButton = new System.Windows.Controls.Button();
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          //Set Button Style            
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          myButton.Style = s;
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          // Set the Imagebrush as the Background for the Button
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          myButton.Background = backgroundImage;
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          myButton.Content = "Click Here";
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          myButton.IsEnabled = true;
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          myButton.HorizontalAlignment = HorizontalAlignment.Left;
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          // Add the Button to the Chart's Toolbar
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          chartWindow.MainMenu.Add(myButton);
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          //Prevent the Button From Displaying when WorkSpace Opens if it is not in an active tab
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          myButton.Visibility = Visibility.Collapsed;
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          foreach (TabItem tab in this.chartWindow.MainTabControl.Items)
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          {
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              if ((tab.Content as ChartTab).ChartControl == this.ChartControl
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                   && tab == this.chartWindow.MainTabControl.SelectedItem)
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              {
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                  myButton.Visibility = Visibility.Visible;
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              }
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          }
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          IsToolBarButtonAdded = true;
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      }));
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  }
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  private void DisposeCleanUp()
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  {
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      //ChartWindow Null Check
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      if (chartWindow != null)
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      {
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          //Dispatcher used to Assure Executed on UI Thread
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          ChartControl.Dispatcher.InvokeAsync((Action)(() =>
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          {
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              //Button Null Check
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              if (myButton != null)
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              {
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                  //Remove Button from Indicator's Chart ToolBar
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                  chartWindow.MainMenu.Remove(myButton);
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              }
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          }));
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      }
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  }
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}