How to get NT AUTHORITY\Authenticated Users group using .NET object model

Yes obviously I can hard code a string constant for the value and use the string "NT AUTHORITY\Authenticated Users but I hate hard coding values if the object model is rich enough to provide me a way.

Following method will return NT AUTHORITY\Authenticated Users group as a string

public static string GetNTAuthenticatedUsers()
{
return new SecurityIdentifier(WellKnownSidType.AuthenticatedUserSid, null).Translate(typeof(NTAccount)).Value;
}