Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DtoAssembler/DtoAssembler.cs
===================================================================
diff -u -r6436 -r6968
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DtoAssembler/DtoAssembler.cs	(.../DtoAssembler.cs)	(revision 6436)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DtoAssembler/DtoAssembler.cs	(.../DtoAssembler.cs)	(revision 6968)
@@ -236,7 +236,7 @@
     /// <returns>An XElement instance</returns>
     public override XElement CreateDataTransferObject(TDomainObject domainObj)
     {
-        if (domainObj == null)
+        if (EqualityComparer<TDomainObject>.Default.Equals(domainObj, default(TDomainObject)))
         {
             return null;
         }