title: WP7 - Polygon Textbox
body: <p>How to create image textbox in WP7?</p>
  
  <p>I do not know enough Expression Blend.![similar to the image]
  textbox shape like in the imageImage link:</p>
  
  <p><img src="https://i.stack.imgur.com/yMML8.png" alt=""></p>