title: return an SPListItemCollection with one random item
body: <p>I have an SPListItemCollection.</p>
  
  <p>I basically want to get one of the items (randomly) in the collection and return it.</p>
  
  <p>My method has a return type that expects an SPListItemCollection, so I dont mind having an SPListItemCollection that has just the one item in it and returning that.</p>
  
  <p>Im not sure how to return an SPListItemCollection with this one item in it</p>
  
  <p>how can i do this?  </p>