Refer
http://stackoverflow.com/questions/19589719/listbox-value-display-in-windows-phone-8
http://visualstudiomagazine.com/articles/2012/08/06/multiple-item-templates-in-windows-phone.aspx
http://kishore1021.wordpress.com/2011/06/11/introduction-to-data-templates-datatemplate-with-listbox-part2/