You are creating an XML Web service named ViewOrders that is available to customers over the Internet. ViewOrders exposes a Web method named ViewShippingDetail that requires additional security. You decide to use generic role-based security to secure ViewShippingDetail. You need to write code to ensure that once the caller is authenticated, a user identity named Generic is created. This user identity has membership in a group named Shipping to allow access to ViewShippingDetail.

Which code segment should you use?

A.
System.Security.Principal.IIdentity myIdentity = new
GenericIdentity(“Generic”, “Custom”);
string[] Roles = {“Shipping”};
GenericPrincipal myPrincipal = new GenericPrincipal(myIdentity, Roles); myIdentity = WindowsIdentity.GetCurrent();

B.
GenericIdentity myIdentity = new
GenericIdentity(“Generic”, “Custom”);
string[] Roles = {“Shipping”};
GenericPrincipal myPrincipal = new
GenericPrincipal(myIdentity, Roles);
Thread.CurrentPrincipal = myPrincipal;

C.
IIdentity myIdentity = new
GenericIdentity(“Generic”, “Shipping”);
IPrincipal myPrincipal = new
WindowsPrincipal((WindowsIdentity) myIdentity);
Thread.CurrentPrincipal = myPrincipal;

D.
IIdentity myGenericIdent = new
GenericIdentity(“Generic”, “Custom”);
WindowsIdentity myIdentity = (WindowsIdentity) myGenericIdent; string[] Roles = {“Shipping”};
GenericPrincipal myPrincipal = new
GenericPrincipal(myIdentity, Roles);
WindowsIdentity.Impersonate(myIdentity.Token);