System.Web.Security.MembershipProvider.CreateUser C# (CSharp) Method

		public abstract MembershipUser CreateUser (string username, string password, string email, string pwdQuestion, string pwdAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status);
		public abstract bool DeleteUser (string name, bool deleteAllRelatedData);

 public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer,
                                           bool isApproved, object providerUserKey, out MembershipCreateStatus status)
 {
     try
     {
         if (string.IsNullOrEmpty(email))
         {
             email = username;
         }
         MembershipUser u = GetUserByOpenId(username, false);
         if (u == null)
         {
             WebRequest request = HttpWebRequest.Create(Utility.NormalizeIdentityUrl(username));
             request.Method = "HEAD";
             var response = request.GetResponse();
             u = NonOpenIdMembershiProvider.CreateUser(username, password, email, passwordQuestion, passwordAnswer,
                                                       isApproved, providerUserKey, out status);
             LinkUserWithOpenId(username, u.ProviderUserKey);
             return(u);
         }
         else
         {
             status = MembershipCreateStatus.DuplicateUserName;
         }
     }
     catch (Exception ex)
     {
         status = MembershipCreateStatus.InvalidUserName;
     }
     return(null);
 }