private void ButtonAddEmployee_Click(object sender, EventArgs e)
{
try
{
_controller.AddEmployee(this);
Close();
}
catch (Exception ex) when(ex is InvalidPersonDataException ||
ex is EmployeeWithOibAlreadyExistsException)
{
MessageBox.Show(ex.Message, @"Error", MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}