A.var secretPeople = （from p in allPeople from u in secretUsers  where p.UserId == u select p）.Distinct（）； return allPeople.Except（secretPeople）；
B.return from p in allPeople from u in secretUsers where p.UserId != u select p；
C.return （from p in allPeople  from u in secretUsers where p.UserId != u select p）.Distinct（）；
D.List people = new List（ from p in allPeople from u in secretUsers where p.UserId != u select p）； return people.Distinct（）；

A._entities.People.Attach（personToEdit）； _entities.ObjectStateManager.ChangeObjectState（personToEdit， EntityState.Modified）； _entities.SaveChanges（）；
B._entities.ObjectStateManager.ChangeObjectState（personToEdit， EntityState.Added）；_entities.SaveChanges（）；
C._entities.People.ApplyCurrentValues（personToEdit）； _entities.SaveChanges（）；
D._entities.People.Attach（new Person（） { Id = personToEdit.Id }）；_entities.ObjectStateManager.ChangeObjectState（personToEdit， EntityState.Modified）；_entities.SaveChanges（）；

A.JsonValue = json.Serialize（people.Select（p => p.Name））；
B.var names = from person in people select person； JsonValue = "{" + json.Serialize（names） + "}"；
C.JsonValue = json.Serialize（people.SelectMany（ p =>Name.AsEnumerable（）））；
D.var names = from person in people select person； JsonValue = json.Serialize（names）；

A.Replace the asp：QueryStringParameter with the following declaration.
B.Replace the asp：QueryStringParameter with the following declaration.
C.Add the following event handler to the Selecting event of the ObjectDataSource control.
D.Add the following code segment to the page’s code-behind.

A. dtlView.DataSource = GetCustomerOrderDataSet（）； dtlView.DataMember = "OrderDetailsTable"； dtlView.DataBind（）；
B.dtlView.DataSource = GetCustomerOrderDataSet（）； dtlView.DataSourceID = "OrderDetailsTable"； dtlView.DataBind（）；
C.dtlView.DataSource = GetCustomerOrderDataSet（）； dtlView.DataKeyNames = new string [] { "OrderDetailsTable"}； dtlView.DataBind（）；
D.DataSet dataSet = GetCustomerOrderDataSet（）； dtlView.DataSource = new DataTable（"dataSet"， "OrderDetailsTable"）； dtlView.DataBind（）；

A.Run the aspnet_regiis.exe command.
B.Set the Treat warnings as errors option to All in the project properties and recompile.
C.Add the following rule to the  section of the web.config file.
D.Add the following rule to the  section of the web.config file.

A.In the context menu for the service reference in the ASP.NET project， select the Configure Service Reference commSystem.Collections.Generic.List
B.In the context menu for the service reference in the ASP.NET project， select the Update Service Reference comma
C.Change the service interface and implementation to return a List
D.Edit the address property of the endpoint element in the web.config file to use the new service address

A.void Application_Start（object sender， EventArgs e） { SiteHelper.Configure（）； }
B.void Application_Init（object sender， EventArgs e） { SiteHelper.Configure（）； }
C.void Application_BeginRequest（object sender， EventArgs e） { SiteHelper.Configure（）； }
D.Object lockObject = new Object（）； void Application_BeginRequest（object sender， EventArgs e） { lock（lockObject（）） { SiteHelper.Configure（）； } }

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.

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"）