title: WPF PropertyGrid Problem
body: <p>I am trying to create a WPF based PropertyGrid.</p>
  
  <p>Recently i tried wpg.codeplex.com project, but i had some problems with this control.
  Now, i am trying to develop <a href="http://blog.joachim.at/?p=36" rel="nofollow">http://blog.joachim.at/?p=36</a> this project.</p>
  
  <p>I successfully added Enum Values, support but i have got problems with collections.</p>
  
  <p>For example my custom object has a property that name is City and type is Guid.
  I want, users can select City from combobox. </p>
  
  <p>I was fighting with TypeConverts, IValueConverts, and etc..</p>
  
  <p>How can i solve this?</p>