A.protected void SelectedLanguageChanged（object sender， EventArgs e） {Page.UICulture = ddlLanguage.SelectedValue；}
B.protected override void InitializeCulture（） {Page.UICulture = Request.Form["ddlLanguage"]；}
C.protected void Page_Load（object sender， EventArgs e） {Page.Culture = Request.Form["ddlLanguage"]；}
D.protected override void InitializeCulture（） {Page.Culture = ddlLanguage.SelectedValue；}

A.Add the following code segment to the Page_Load method of the page code-behind file. CustomMaster custom = this.Parent as CustomMaster； lblRegion.Text = custom.Region；
B.Add the following code segment to the Page_Load method of the page code-behind file. CustomMaster custom = this.Master as CustomMaster； lblRegion.Text = custom.Region；
C.Add the following code segment to the Page_Load method of the Custom.Master.cs code-behind file. Label lblRegion = Page.FindControl（"lblRegion"） as Label； lblRegion.Text = this.Region；
D.Add the following code segment to the Page_Load method of the Custom.Master.cs code-behind file. Label lblRegion = Master.FindControl（"lblRegion"） as Label； lblRegion.Text = this.Region；

A.Add the following directive to TestPage.aspx. <%@ MasterType VirtualPath="~/TestMaster.master" %><%@ mastertype="" virtualpath="~/TestMaster.master">
B.Add the following directive to TestPage.aspx. <%@ PreviousPageType VirtualPath="~/TestMaster.master" %><%@ previouspagetype="" virtualpath="~/TestMaster.master">
C.Set the Strict attribute in the @ Master directive of the TestMaster.master page to true.
D.Set the Explicit attribute in the @ Master directive of the TestMaster.master page to true.

A.Add the following method override. Protected Overrides Sub OnInit（ByVal e As EventArgs）  MyBase.OnInit（e） If （Page.IsValid） Then Me.SaveToDatabase（） End Sub
B.Add the following method override. Protected Overrides Sub OnLoad（ByVal e As EventArgs）  MyBase.OnLoad（e） If （Page.IsValid） Then Me.SaveToDatabase（） End Sub
C.Add the following method override.Protected Overrides Sub OnPreRender（ByVal e As EventArgs）  MyBase.OnPreRender（e） If （Page.IsValid） Then Me.SaveToDatabase（） End Sub
D.Add the following code segment at line 10. If （Page.IsValid） Then Me.SaveToDatabase（）

A.Replace line 05 with the following code segment. routes.MapRoute（ "Default"， "{controller}/{action}/{id}"， New With {.controller = "Home"， .action = "DetailsByUsername"， .id = ""}）
B.Replace line 05 with the following code segment. routes.MapRoute（"Default"， "{controller}/{action}/{username}"， New With {.controller = "Home"， .action = "DetailsByUsername"， .username = ""}， New With {.username = "\w{3，20}"} ）
C.At line 04， add the following code segment.routes.MapRoute（ "Details byUsername""{username}"， New With {.controller = "Home"， .action = "DetailsByUsername"}， New With {.username = "\w{3，20}"}）
D.At line 04， add the following code segment. routes.MapRoute（ "Details by Username"， "{id}"，  New With {.controller = "Home"， .action = "DetailsByUsername"}， New With {.id = "\w{3，20}"} ）

A.Replace line 11 with the following code segment. context.MapRoute（"product_default"，   "{area}/{controller}/{action}/{id}"， New With {.area = "product"， .controller = "Product"，   .action = "Index"， .id = ""}）
B.Replace line 11 with the following code segment. context.MapRoute（"product_default"，   "{area}"， New With {.controller = "Product"， .action = "Index"， .id = ""}）
C.Add the following code segment at line 12.  AreaRegistration.RegisterAllAreas（）
D.Add the following code segment to the RegisterRoutes method in the Global.asax.vb file.   AreaRegistration.RegisterAllAreas（）

A.Public Sub New(ByVal app As HttpApplication) AddHandler app.EndRequest, AddressOf app_EndRequest  End Sub  Sub app_EndRequest(ByVal sender As Object, ByVal e As EventArgs)    Dim app As HttpApplication = TryCast(sender, HttpApplication)  app.Response.Write(footerContent)  End Sub 
B.Public Sub Init(ByVal app As HttpApplication) _  Implements IHttpModule.Init  AddHandler app.EndRequest, AddressOf app_EndRequest  End Sub Sub app_EndRequest(ByVal sender As Object, ByVal e As EventArgs)  Dim app As HttpApplication = New HttpApplication()  app.Response.Write(footerContent)  End Sub 
C.Public Sub New()  Dim app As HttpApplication = New HttpApplication()  AddHandler app.EndRequest, AddressOf app_EndRequest End Sub  Sub app_EndRequest(ByVal sender As Object, ByVal e As EventArgs)  Dim app As HttpApplication = TryCast(sender, HttpApplication)  app.Response.Write(footerContent)  End Sub 
D.Public Sub Init(ByVal app As HttpApplication) _  Implements IHttpModule.Init  AddHandler app.EndRequest, AddressOf app_EndRequest  End Sub  Sub app_EndRequest(ByVal sender As Object, ByVal e As EventArgs)  Dim app As HttpApplication = TryCast(sender, HttpApplication)app.Response.Write(footerContent)  End Sub

A.Configure the SqlMembershipProvider in the web.config file.
B.Configure the SqlProfileProvider in the web.config file.
C.Create an ASP.NET page that contains a default CreateUserWizard control to create a new user account.
D.Create an ASP.NET page that contains a custom form that collects the user information and then uses the Membership.CreateUser method to create a new user account.

A.Add the following method to the CompanyController class. Function Info（） As ActionResult   Return View（） End Function
B.Add the following method to the CompanyController class. Function Company_Info（） As ActionResult  Return View（） End Function
C.Right-click the Views folder， and select View from the Add submenu to create the view for the action.
D.Right-click inside the action method in the CompanyController class， and select Add View to create a view for the action

A.Html.ActionLink（"Home"， "Index"， "Home"）
B.Html.ActionLink（"Home"， "Index"， "Home"，  New With {.area = ""}， Nothing）
C.Html.ActionLink（"Home"， "Index"， "Home"，  New With {.area = "Blog"}， Nothing）
D.Html.ActionLink（"Home"， "Index"， "Home"，  New With {.area = "Home"}， Nothing）

A.AjaxHelper
B.XDocument
C.JsonResult
D.DataContractJsonSerializer