title: Windows Phone 7 textbox validation using MVVM light
body: <p>What is the best way to do this for a WP7 7.0 app (SL3).  Should I use visual states? IS there a way to use attributes from the model sort of like the Silverlight examples would do ? Any good examples with MVVM+WP7?  </p>
  
  <p>So far all I can find is these two examples.</p>
  
  <p><a href="http://babaandthepigman.wordpress.com/2010/10/21/simple-textbox-validation-wp7/" rel="nofollow">http://babaandthepigman.wordpress.com/2010/10/21/simple-textbox-validation-wp7/</a>
  <a href="http://www.windowsphonegeek.com/articles/Building-WP7-Custom-Validation-Control---Architecture-amp-Basic-Prototype" rel="nofollow">http://www.windowsphonegeek.com/articles/Building-WP7-Custom-Validation-Control---Architecture-amp-Basic-Prototype</a></p>