public void GetUserById(string userId) { UserViewModel user = _users.SingleOrDefault(x => x.Id == userId); if (user != null) { _userView.Id = user.Id; _userView.FirstName = user.FirstName; _userView.LastName = user.LastName; _userView.Department = user.Department; _userView.Sex = user.Sex; _userView.SetInputFieldsForUpdating(); } else { MessageBox.Show("asd", "Információ!", MessageBoxButtons.OK, MessageBoxIcon.Information); } }