title: Call object event from WinForm
body: <p>I need to raise objects event in WinForm. 
  Need to change control state (in UI) when object property has been changed. How can I raise objects event in UI?</p>
  
  <p>EDIT: On form i have 2 drop downs binded to object properties. I need to disable second drop down when selection on first one is false.</p>