Another interesting method that I found while investigating LINQ to SharePoint is the RecycleOnSubmit method.

context.Projects.RecycleOnSubmit(aProject);

context.Projects.DeleteOnSubmit(aProject);

If you want to move an item to the Recycle Bin, use the first method but if you want to entirely delete it use the second one.

And of course don’t forget to call context.SubmitChanges() to commit the changes to the content database.