问题：

[多选] You are implementing a new Dynamic Data Web site. The Web site includes a Web page that has an ObjectDataSource control named ObjectDataSource1. ObjectDataSource1 interacts with a Web service that exposes methods for listing and editing instances of a class named Product. You add a GridView control named GridView1 to the page， and you specify that GridView1 should use ObjectDataSource1 as its data source. You then configure GridView1 to auto-generate fields and to enable editing. You need to add Dynamic Data behavior to GridView1. You also must ensure that users can use GridView1 to update Product instances. Which two actions should you perform？（）

A . Add a DynamicDataManager control to the Web page.
B . Disable the auto-generated fields on GridView1. Add a DynamicField control for each field of the Product class.
C . Add the following code segment to the Application_Start method in the Global.asax.cs file.
D . Add the following code segment to the Page_Init method of the Web page.