title: Nullable class?
body: <p>I have this class</p>
  
  <pre><code>public class FilterQuery
      {
          public FilterQuery() { }
  
          public string OrderBy { set; get; }
          public string OrderType { set; get; }        
  
          public int? Page { set; get; }
          public int ResultNumber { set; get; }
  
      }
  </code></pre>
  
  <p>I would like to use it like this </p>
  
  <pre><code>public IQueryable&lt;Listing&gt; FindAll(FilterQuery? filterQuery)
  </code></pre>
  
  <p>Is this possible?</p>