You are implementing an ASP.NET Web site. The site uses a component that must be dynamically configured before it can be used within site pages. You create a static method named SiteHelper.Configure that configures the component. You need to add a code segment to the Global.asax file that invokes the SiteHelper.Configure method the first time， and only the first time， that any page in the site is requested. Which code segment should you use？ （）

单项选择题YouareimplementinganASP.NETWebsite.TherootdirectoryofthesitecontainsapagenamedError.aspx.YouneedtodisplaytheError.aspxpageifanunhandlederroroccursonanypagewithinthesite.YoualsomustensurethattheoriginalURLinthebrowserisnotchanged.Whatshouldyoudo？（）

A.Add the following configuration to the web.config file.
B.Add the following configuration to the web.config file.
C.Add the following code segment to the Global.asax file.
D.Add the following code segment to the Global.asax file.

单项选择题YouarecreatinganASP.NETWebsite.ThesiteisconfiguredtouseMembershipandRolemanagementproviders.Youneedtocheckwhetherthecurrentlylogged-onuserisamemberofarolenamedAdministrators.Whichcodesegmentshouldyouuse？（）

A.bool isMember = Roles.GetUsersInRole（"Administrators"）.Any（）
B.bool isMember = Membership.ValidateUser（User.Identity.Name， "Administrators"）
C.bool isMember = Roles.GetRolesForUser（"Administrators"）.Any（）
D.bool isMember = User.IsInRole（"Administrators"）

多项选择题YoucreateanASP.NETpagethatcontainsthefollowingtag.PageNameYouneedtowritecodethatwillchangethecontentsofthetagdynamicallywhenthepageisloaded.Whataretwopossiblewaystoachievethisgoal？（）

A.this.hdr1.InnerHtml = "Text"；
B.（hdr1.Parent as HtmlGenericControl）.InnerText = "Text"；
C.HtmlGenericControl h1 = this.FindControl（"hdr1"） as HtmlGenericControl；h1.InnerText = "Text"；
D.HtmlGenericControl h1 = Parent.FindControl（"hdr1"） as HtmlGenericControl；h1.InnerText = "Text"；

单项选择题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? （）

A.Add the following OnPreRender event handler to the asp：DropDownList
B.Add the following OnPreRender event handler to the asp：DropDownList
C.Add the following event handler to the page code-behind.
D.Add the following event handler to the page code-behind.

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\" />");