title: LINQ to SQL "1 of 2 Updates failed" on "SubmitChanges()"
body: <p>I am updating an object of type X and its children Y using LINQ to SQL and then submitting changes and getting this error</p>
  
  <p>Example Code</p>
  
  <pre><code>X objX = _context.X.ToList().Where(x =&gt; x.DeletedOn == null).First();
  objX.DeletedOn = DateTime.Now;
  
  EntitySet&lt;Y&gt; objYs = objX.Ys;
  Y objY = objYs[0];
  objY.DeletedOn = DateTime.Now;
  
  _context.SubmitChanges();
  </code></pre>
  
  <p>On SubmitChanges() I get an exception "1 of 2 Updates failed", no other information as to why that happened. Any ideas?</p>
  
  <p>Also the exception type is 
  ChangeConflictException</p>