title: ComboBox.SelectedValue does not match displayed text when DropDownStyle = DropDownList in Windows 7
body: <p>Let's say we have the following code in a Windows application:</p>
  
  <pre><code>ComboBox comboBox = new ComboBox()
  {
      AutoCompleteMode = AutoCompleteMode.SuggestAppend,
      AutoCompleteSource = AutoCompleteSource.ListItems,
      DataSource = new string[] { "", "Ark", "Boat", "Bucket" },
      DropDownStyle = ComboBoxStyle.DropDownList
  };
  this.Controls.Add(comboBox);
  
  TextBox textBox = new TextBox()
  {
      Left = comboBox.Right,
      Top = comboBox.Top,
      ReadOnly = true
  };
  textBox.DataBindings.Add("Text", comboBox, "SelectedValue");
  this.Controls.Add(textBox);
  </code></pre>
  
  <p>No magic here, just a <code>ComboBox</code> bound to a list of strings.  The <code>TextBox</code> displays the <code>SelectedValue</code> of the <code>ComboBox</code>.</p>
  
  <p>I'm getting unexpected behavior when I type "Bucket" into the <code>ComboBox</code> and tab away.  For some reason the <code>ComboBox</code> displays "Boat" but the <code>TextBox</code> displays "Bucket".  I would expect them both to display "Bucket".</p>
  
  <p>It behaves as expected if I change the <code>DropDownStyle</code> to <code>DropDown</code>, but I don't want users to be able to type anything they want.  They should only be able to type items that are in the list.</p>
  
  <p>Even more interesting is that, after typing "Bucket" and tabbing away, if I type "Bucket" again it will display "Bucket" in both.  If I make a third attempt, it goes back to "Boat" for the <code>ComboBox</code> and "Bucket" for the `TextBox'.  So it seems like it's cycling through all the B's.</p>
  
  <p>I didn't notice this until I upgraded from XP to Windows 7 recently.  I don't see how that could have anything to do with this, but I'm throwing it out anyway.</p>
  
  <p>If this behavior is correct, can anyone tell me what I should be doing to achieve my expected behavior?</p>
  
  <p><strong>UPDATE</strong>  It would seem this <em>is</em> related to Windows 7.  Everything behaves as expected in Windows XP Mode.  Can anyone else running Windows 7 try my code and verify that I'm not crazy?</p>