Gets the information from the data source for the membership user associated with the specified unique identifier and updates the last activity date/time stamp for the user, if specified.
A System.Web.Security.MembershipUser object representing the user associated with the specified unique identifier. If no user is found in the database for the specified providerUserKey value, null is returned.
Membership.GetUser(object, bool) retrieves the user information from the data source and creates a System.Web.Security.MembershipUser object populated with the returned data. The user is identified using the unique identifier specified with the providerUserKey parameter.