Set EntityCollection in Linq projection

Question

I would like to know how I can set the EntityCollection in the Linq Projection. Below is my code:

var orders = (from order in context.Orders
   select new
   {
    reference = order.reference,
    pe = order.OrderExecutions //this is an EntityCollection
   })
.AsEnumerable()
.Select(o =>
     (Orders)new Orders
     {
      reference = o.reference,
      OrderExecutions = o.pe
     }
).ToList().AsQueryable();

(This code seems weird, but it must be such as to work in the telerik grid)

The manual OrderExecutions = o.peincludes this error:

EntityCollection has already been initialized. The InitializeRelatedCollection method should be called only to initialize a new EntityCollection during deserialization of the object graph.

OrderExecutions is the EntityCollection contained in the Orders object.

How can I avoid this error? Any idea?

Should I change the generated code in the Order object?

[XmlIgnoreAttribute()]
[SoapIgnoreAttribute()]
[DataMemberAttribute()]
[EdmRelationshipNavigationPropertyAttribute("PModel", "FK__orderExec__refer__70DDC3D8", "OrderExecutions")]
public EntityCollection<OrderExecutions> OrderExecutions
{
 get
 {
  return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<OrderExecutions>("PModel.FK__orderExec__refer__70DDC3D8", "OrderExecutions");
 }
 set
 {
  if ((value != null))
  {
   ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<OrderExecutions>("PModel.FK__orderExec__refer__70DDC3D8", "OrderExecutions", value);
  }
 }
}

Thanks in advance.

Answer 1

var orders = from order in context.Orders
             select new
             {
                 reference = order.reference,
                 OrderExecutions = order.OrderExecutions //this is an EntityCollection
              };

IEnumerable, . , IQueryable, LINQ IQueryable. ToList(), . , - .