I had a LINQ to SQL code for one of my article coming soon in a magazine where I wrote the code during the Beta 2 of the LINQ to SQL. Now when I try to run the same code on VS 2008 I got errors on the "Add" and "Remove" method of the entities inside the DataContext.
                For example:
                            // Create a new instance of the DataContext
                            CustomerDataContext db = BizObject.Context;
                            // Create a new customer and add it to the DataContext
                            // to be able to have the DataContext track changes on the object
                            Customer localCustomer = new Customer {
                                    FirstName = customer.FirstName,
                                    LastName = customer.LastName,
                                    Email = customer.Email
                            };
                           
                            // Add the item to the DataContext           
                            db.Customers.InsertOnSubmit(localCustomer);
                There is no Add method anymore, it got replaced with InsertOnSubmit method, Same applies to the Remove method, it was replaced by DeleteOnSubmit method. For a complete list of the changes, visit this link on the MSDN forums:
                http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2060651&SiteID=1
                 
                Hope this helps you,
                Regards
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