private void RegisterForm_Register() { shopModel.RegisterAccount(registerForm.UsersLogin, registerForm.UsersPasswrod, out string errorMessage); if (!string.IsNullOrEmpty(errorMessage)) { registerForm.ShowError(errorMessage); return; } MessageBox.Show("Вы успешны зарегестрированы"); ServiceForms.ShowForm("LoginForm"); ServiceForms.CloseForm(registerForm); }