Brewage.Web.Controllers.AccountController.ValidateRegistration C# (CSharp) Метод

        private bool ValidateRegistration(string userName, string email, string password, string confirmPassword)
        {
            if (String.IsNullOrEmpty(userName))
            {
                ModelState.AddModelError("username", "You must specify a username.");
            }
            if (String.IsNullOrEmpty(email))
            {
                ModelState.AddModelError("email", "You must specify an email address.");
            }
            if (password == null || password.Length < MembershipService.MinPasswordLength)
            {
                ModelState.AddModelError("password",
                    String.Format(CultureInfo.CurrentCulture,
                         "You must specify a password of {0} or more characters.",
                         MembershipService.MinPasswordLength));
            }
            if (!String.Equals(password, confirmPassword, StringComparison.Ordinal))
            {
                ModelState.AddModelError("_FORM", "The new password and confirmation password do not match.");
            }
            return ModelState.IsValid;
        }