public override MyCmsMembershipUser GetUserName(string username)
        {
            IQueryable<MyCmsMembershipUser> query = from u in dataContext.Users
                                       where u.UserName == username
                                       select new MyCmsMembershipUser(
                                           "",
                                           u.UserName,
                                           u.UserId,
                                           u.FirstName,
                                           u.LastName,
                                           u.Email,
                                           u.PhoneNumber,
                                           u.IsApproved,
                                           u.IsLockedOut,
                                           u.CreationDate,
                                           u.LastLoginDate,
                                           u.LastActivityDate,
                                           u.Country,
                                           u.State,
                                           u.City,
                                           u.Occupation,
                                           u.MSN,
                                           u.Yahoo,
                                           u.GoogleTalk,
                                           u.AIM,
                                           u.ICQ,
                                           u.Skype,
                                           u.TotalPosts,
                                           u.HasAvatar,
                                           u.AvatarUrl,
                                           u.DisplayInMemberList,
                                           u.IsOnline,
                                           u.PasswordQuestion,
                                           u.PasswordAnswer,
                                           u.Comment,
                                           u.LastLockOutDate,
                                           u.LastPasswordChangeDate,
                                           u.Password);

            MyCmsMembershipUser user = new MyCmsMembershipUser();
            user = query.FirstOrDefault();  ////   вот тут я получаю ошибку

            return user;
        }

System.NotSupportedException: Only parameterless constructors and initializers are supported in LINQ to Entities.

Error	3	Cannot initialize type 'Chdmc.Web.Core.Security.MyCmsMembershipUser' with a collection initializer because it does not implement 'System.Collections.IEnumerable'	D:\Study\MyProjects\Chdmc\Chdmc.Web\Core\Security\MyCmsMembership.cs	68	72	Chdmc.Web