title: Check for null values in LINQ to datatable
body: <p>My Linq query is some thing like this:</p>
  
  <pre><code>IEnumerable&lt;Results&gt; subResult = from query in datatable.AsEnumerable()
                                select new Results
                                    {
                                        Name = query.Field&lt;string&gt;("Name"),
                                        Date = query.Field&lt;DateTime?&gt;("Date")
                                    }
  </code></pre>
  
  <p>in this one, there are some nulls coming into 'Name' field and how can I set it to zero if there is any <code>null</code>. 
  How it can be done?</p>