Why do Entity Framework queries not return unsaved entities

Question

Consider the following code:

var Products_First = (from Entities.Product p in myContext.Product  
                      select p);

Entities.Product newProdu         


        

Answer 1

Properties of type ObjectQuery<T>, like myContext.Product, always query the DB. That's what they do.

In EF 4.1 you can use DbSet<T>.Local to query memory.

In EF < 4.1 you would use:

ObjectContext.ObjectStateManager.GetObjectStateEntries(EntityState.Added).Select(o => o.Entity).OfType<Product>()