If you use LINQ to SQL and you’re entities are not loaded after you call a GetQuery on the DomainContext, you probably did not use a callback.

TTSDomainContext context = new TTSDomainContext();
LoadOperation op = context.Load(
context.GetTasksQuery(),
result =>
{
  if (!result.HasError)
  {
    //At this point the entities are loaded

       }
    },null);