Using LINQ's Include method - missing in LightSpeed?

With MS Entity Framework, I am able to "include" related sub-tables when I query for an entity.
e.g.

using (Models.MerchEntities db = new Models.MerchEntities())
{
      // Try to get existing item
       VendorCatalogItem = db.VendorCatalogItem.**Include**("VendorCatalogItemTierCost")
                                                .Where(a => a.Upc.Equals(vendorCatalogItem.upc, StringComparison.InvariantCultureIgnoreCase)
                                                .FirstOrDefault();

However, if I try the same thing with Lightspeed, the "Include" method is not found?

How do I include related sub-tables records when fetching a parent entity?

Thanks, Carl

.Include() is an EntityFramework specific extension method.

As a background to this Child associations will always be available to be lazily loaded on property access but to have these loaded inline with the entity itself you want to use a named aggregate to control the load.

Here are the pages in the documentation which go in to this subject more:

• http://www.mindscapehq.com/documentation/lightspeed/Performance-and-Tuning/Controlling-How-Entities-Load
• http://www.mindscapehq.com/documentation/lightspeed/Performance-and-Tuning/Understanding-Named-Aggregates

And here is a blog post with some more examples of this: http://www.mindscapehq.com/blog/index.php/2011/01/19/controlling-lightspeed-entity-loading-with-named-aggregates/

Jeremy