title: How to query only specific properties of RealmObject?
body: <p>For example, I have object:</p>
  
  <pre><code>public class person : RealmObject { 
          public string firstname { get; set; }
          public string secondname { get; set; }
          public int age { get; set; }
          public string address { get; set; }
  }
  </code></pre>
  
  <p>How to make query that will give me only list of addresses or firstnames + secondnames?</p>
  
  <p>Or firstname and age.</p>