title: Forcibly Suggesting Combo Box Auto Complete Mode To None - C# WinForms
body: <p>I am using Metro Frame Work Combo Box in my WinForm, </p>
  
  <p>When I try to set <code>cmbCACName.AutoCompleteMode = AutoCompleteMode.Append;</code> it is throwing an exception like 'AutoCompleteMode.None can be used when DropDownStyle is ComboBoxStyle.DropDownList'.</p>
  
  <p>Here is my code</p>
  
  <pre><code>cmbCACName.DropDownStyle = ComboBoxStyle.Simple;
  cmbCACName.AutoCompleteMode = AutoCompleteMode.Append;
  cmbCACName.AutoCompleteSource = AutoCompleteSource.ListItems;
  </code></pre>
  
  <p>Here is an exception:
  <a href="https://i.stack.imgur.com/XlPXs.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XlPXs.jpg" alt="enter image description here"></a></p>
  
  <p>I could not understand what is happening.</p>
  
  <p>Thanks in advance</p>