~Windows Setter 2003操作系统中，IIs 6．0不提供下列（)服务。A．WebB．SMTPC．POP3D．ntP

You are creating a Windows Communication Foundation (WCF) service to process orders.The data contract for the order is defined as follows:[DataContract]public class Order{ [DataMember] public string CardHolderName { get; set; } [DataMember] public string CreditCardNumber { get; set; }}You have the following requirements: Enable the transmission of the contents of Order from the clients to the service. Ensure that the contents of CreditCardNumber are not sent across the network in clear text. Ensure that the contents of CreditCardNumber are accessible by the service to process the order.You need to implement the service to meet these requirements. What should you do？（）

A. Add a DataProtectionPermission attribute to the CreditCardNumber property and set the ProtectData property to true.

B. Convert the DataContract to a MessageContract and set the ProtectionLevel property to SignAndEncrypt.

C. Change the data type of CreditCardNumber from string to SecureString.

D. Implement the CreditCardNumber property getter and setter In the setter, run the value of the CreditCardNumber through the MD5CryptoServiceProvider class TransformBlock method.

A.c：\winnt

B.c：\windows 2003

C.c：\windows

D.c：\windows server 2003

ss named Customer to the application.You select the Customer class to create a new object data source.You add the following components to a Windows Form:A BindingSource component named customerBindingSource that is data-bound to the Customer object data source.A set of TextBox controls to display and edit the Customer object properties.Each TextBox control is data-bound to a property of the customerBindingSource component.An ErrorProvider component named errorProvider that validates the input values for each TextBox control.You need to ensure that the input data for each TextBox control is automatically validated by using the ErrorProvider component.Which two actions should you perform？（）

A.Implement the validation rules inside the Validating event handler of each TextBox control by throwing an exception when the value is invalid.

B.Implement the validation rules inside the TextChanged event handler of each TextBox control by throwing an exception when the value is invalid.

C.Implement the validation rules inside the setter of each property of the Customer class by throwing an exception when the value is invalid.

D.Add the following code segment to the InitializeComponent method of the Windows Form.this.errorProvider.DataSource = this.customerBindingSource;

E.Add the following code segment to the InitializeComponent method of the Windows Form. this.errorProvider.DataSource = this.customerBindingSource.DataSource; this.errorProvider.DataMember = this.customerBindingSource.DataMember;