title: Autocomplete combobox .net doesn't work
body: <p>this should be a simple issue! :-)</p>
  
  <p>In a Winform I have a combobox that is populated at runtime, from a textfile, using LINQ code.</p>
  
  <p>The combo contains a list of countries.</p>
  
  <p>I set DropDown style to "DropDown"</p>
  
  <p>Autocomplete mode to SuggestAppend (or Suggest, it doesn't change the behavior for me)
  AutocompleteSource to ListItems</p>
  
  <p>And when I run and enter some text in the form, NOTHING HAPPENS!</p>
  
  <p>I must click the combo right arrow to see the list.</p>
  
  <p>Any clue?</p>