private void saveButton_Click(object sender, EventArgs e)
{
User user = new User();
user.Name = firstNameTextBox.Text;
user.LastName = lastNameTextBox.Text;
user.Birthday = Convert.ToDateTime(birthdayTextBox.Text);
user.Age = DateTime.Now.Year - user.Birthday.Year;
user.EmailAddress = emailAddressTextBox.Text;
user.Office = selectOfficeComboBox.SelectedItem.ToString();
user.UserRole = "Сотрудник";
user.Password = passwordTextBox.Text;
db.AddUser(user);
form.DeblockForm();
this.Close();
}