title: How do I initialise DateTimePicker to Null or Empty?
body: <p>How initialize a DateTimePicker to Null or Empty in windows forms?</p>
  
  <p>I tried:</p>
  
  <pre><code>dtNascimento.Format = DateTimePickerFormat.Custom;
  dtNascimento.CustomFormat = " ";
  </code></pre>
  
  <p>But then does not allow changing the value.</p>