title: MarkUpExtension in .Net Metro App
body: <p>I am using C#, XAML in Microsoft Visual Studio. </p>
  
  <p>In WPF with the desktop version of the .Net framework, there is a markupextension class under namespace System.Windows.Markup. Saw it from the accepted answer in this post <a href="https://stackoverflow.com/questions/1659285/should-i-declare-converters-in-app-xaml-or-as-a-per-file-resource">Should I declare converters in App.xaml or as a per-file resource?</a></p>
  
  <p>Is there an equivalent or something that is close to it in for the mobile version of .Net you use to create Metro apps? I can't seem to find the appropriate namespace or is it not supported?</p>