System.Web 2.0.0.0 System.Web.Profile.ProfileBase The class is used by ASP.NET to return a default instance of a user profile when the profile feature is enabled but no properties are defined. Represents a user-profile instance when no profile properties are defined. Constructor The class is used by ASP.NET to return a default instance of a user profile when the profile feature is enabled but no properties are defined. Creates a new instance of the class. 2.0.0.0