title: Sharepoint: Convert a SPFieldMultilineText to SPFieldText
body: <p>Is it possible to programmatically change a "multi-line text field" to "single-line text field" ?</p>
  
  <pre><code>SPFieldMultiLineText field = list.Fields["sample"] as SPFieldMultiLineText;
  // how to change the type to 'single line' now ?
  </code></pre>
  
  <p>Or do I need to create an additional field (with a similiar name) and migrate the content?</p>
  
  <p>Thanks for any help.</p>