title: Adding and changing usercontrol at run time in a WPF application
body: <p>I have a situation as follows, i am going to use WPF for first time, so any suggestion abt how to proceed whould be great:
  I hav a drop down, when i select any item from it - it should change the structure of controls in same window. New controls contain - two menu items and a text box and a list box. Selecting one menuitem will display text box and other will show list box. Now for each item in initial combo box i will have different info for the each menu items.</p>
  
  <p>Problems:
  Say i have 10 items in combo box - and 2 menu items for each - so 20 different stuff to show.
   -- How should i declare these 20 different stuffs
   -- How should i load each when a particular combination is selected</p>