you are creating an asp net web site the is configured..., Appendix, ASP.NET

Question:You are creating an ASP.NET Web site.
The site is configured to use Membership and Role management providers.
You need to check whether the currently logged-on user is a member of a role named Administrators.
Which code segment should you use?

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");

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Question:You are creating an ASP.NET Web site. The site is configured to use Membership and Role management providers. You need to check whether the currently logged-on user is a member of a role named Administrators. Which code segment should you use?

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");

D