public void Register(string login, string password, string repeatedPassword) { if (password != repeatedPassword || password == "") { throw new Exception("Incorrect password setting"); } if (!data.IsLoginExist(login)) { data.CreateNewUser(login, password); EnterView enterView = new EnterView(); ((RegisterView)view).Hide(); enterView.Show(); } else { throw new Exception("User with entered name exists."); } }