title: Search text contains with QueryOver
body: <p>I'm trying to do this :</p>
  
  <pre><code>var list = Session.QueryOver&lt;Person&gt;()
      .Where(x =&gt; x.LastName.Contains(searchText))
      .List&lt;Person&gt;();
  </code></pre>
  
  <p>but I get this error : <em>Unrecognised method call: System.String:Boolean Contains(System.String)</em></p>
  
  <p>Do you have an idea ?</p>
  
  <p><strong>Update :</strong></p>
  
  <pre><code>public class Person
  {
      public virtual string FirstName { get; set; }
      public virtual string LastName { get; set; }
  }
  </code></pre>