title: ASP.NET Ajax Toolkit: What is the maximum number of items in ComboBox?
body: <p>Im building a small form using ComboBoxes with lots of items, and it seems after exactly 510 items added, the ComboBox stops working, and the combo button is hidden.</p>
  
  <p>Is there any maximum number of items that can be added? Or this might be other problem?</p>
  
  <p>Thanks in advance</p>