You are implementing an ASP.NET page that includes the following drop-down list.
You need to dynamically add values to the end of the drop-down list. What should you do? （）

多项选择题You create a custom server control named Task that contains the following code segment. You need to ensure that adding a Task control from the Toolbox creates markup in the following format.     Which two actions should you perform？（）

A.Add the following code segment to the project’s AssemblyInfo.cs file. [assembly： TagPrefix（"DevControls"， "Dev"）]
B.Replace line 05 with the following code segment. [DefaultValue（"New Task"）]
C.Insert the following code segment immediately before line 03. [ToolboxData（"<{0}：Task runat=\"server\" Title=\"New Task\" />"）]
D.Replace line 10 with the following code segment. output.Write("<Dev:Task runat=\"server\" Title=\"New Task\" />");

多项选择题YouusethefollowingdeclarationtoaddaWebusercontrolnamedTestUserControl.ascxtoanASP.NETpagenamedTestPage.aspx.Youaddthefollowingcodetothecode-behindfileofTestPage.aspx.privatevoidTestMethod（）{...}Youdefinethefollowingdelegate.publicdelegatevoidMyEventHandler（）；YouneedtoaddaneventoftypeMyEventHandlernamedMyEventtoTestUserControl.ascxandattachthepage’sTestMethodmethodtotheevent.Whichtwoactionsshouldyouperform？（）

A.Add the following line of code to TestUserControl.ascx.cs. public event MyEventHandler MyEvent；
B.Add the following line of code to TestUserControl.ascx.cs. public MyEventHandler MyEvent；
C.Replace the TestUserControl.ascx reference in TestPage.aspx with the following declaration. <uc:TestUserControl ID="testControl" runat="server" OnMyEvent="TestMethod"/>
D.Replace the TestUserControl.ascx reference in TestPage.aspx with the following declaration. <uc:TestUserControl ID="testControl" runat="server" MyEvent="TestMethod"/>

多项选择题YoucreateaWebpagenamedTestPage.aspxandausercontrolnamedTestUserControl.ascx.TestPage.aspxusesTestUserControl.ascxasshowninthefollowinglineofcode.OnTestUserControl.ascx，youneedtoaddaread-onlymembernamedCityNametoreturnthevalue NewYork .YoualsomustaddcodetoTestPage.aspxtoreadthisvalue.Whichtwoactionsshouldyouperform？（）

A.Add the following line of code to the TestUserControl.ascx.cs code-behind file. public string CityName { get { return "New York"; } } 
B.Add the following line of code to the TestUserControl.ascx.cs code-behind file. protected readonly string CityName = "New York"; 
C.Add the following code segment to the TestPage.aspx.cs code-behind file. protected void Page_Load(object sender, EventArgs e) { string s = testControl.CityName; } 
D.Add the following code segment to the TestPage.aspx.cs code-behind file. protected void Page_Load(object sender, EventArgs e) { string s = testControl.Attributes["CityName"]; } 

单项选择题YoucreateaWebpagenamedTestPage.aspxandausercontrolnamedcontainedinafilenamedTestUserControl.ascx.YouneedtodynamicallyaddTestUserControl.ascxtoTestPage.aspx.Whichcodesegmentshouldyouuse？（）

A.protected void Page_Load（object sender， EventArgs e） { Control userControl=Page.LoadControl（"TestUserControl.ascx"）； Page.Form.Controls.Add（userControl）； }
B.protected void Page_Load（object sender， EventArgs e） { Control userControl = Page.FindControl（"TestUserControl.ascx"）； Page.Form.Controls.Load（userControl）； }
C.protected void Page_PreInit（object sender， EventArgs e） { Control userControl =Page.LoadControl（"TestUserControl.ascx"）；Page.Form.Controls.Add（userControl）； }
D.protected void Page_PreInit（object sender， EventArgs e） { Control userControl = Page.FindControl（"TestUserControl.ascx"）； Page.Form.Controls.Load（userControl）； }

单项选择题You are implementing an ASP.NET application that will use session state in out-of-proc mode. You add the following code. You need to add an attribute to the Person class to ensure that you can save an instance to session state.  Which attribute should you use?（）

A.Bindable
B.DataObject
C.Serializable
D.DataContract