I copied the XAML code and code behind into VS 2008 for the ArcGIS Silverlight sample that uses the Toolkit's Toolbar control to navigate over the map (Zoom In, Zoom Out, Pan, etc.) The only problem is the icons contained in the toolbar are not visible when I run the application. I created an Assets folder and in that folder created an Images folder which is where the images used for the toolbar are stored which is like what is used in the sample. Unfortunately, that does not seem to be recognized as a valid image source. When I test the application, the map is visible but the toolbar is empty. None of the icons are displayed. How do you get the icons to display in an esriToolbar?