title: Binding multilple list to WPF ListBox
body: <p>I have three list, populated from entity framework, i m trying to display list of ItemType.
      Each element in listbox should be like "TypeName CategoryName ItemTypeDetailName IsActive".</p>
  
  <pre><code>Class ItemType has propertis TypeName(string), ItemTypeCategoryId (int), ItemTypeDetailId(int)
  Class ItemTypeCategory has propertis ItemTypeCategoryId (int), CategoryName(string)
  Class ItemTypeDetail has propertis ItemTypeDetailId (int), ItemTypeDetailName(string)
  </code></pre>
  
  <p>I try to use IValueConvertor.
  How to create this binding?</p>