private void InitForm()
{
GenderComboBox.Items.AddRange(new string[] { "Male", "Female" });
var banks_list = _bankManager.GetAllBanks();
BankComboBox.DataSource = banks_list;
BankComboBox.DisplayMember = "Name";
BankComboBox.ValueMember = "BankID";
var country_list = _countryManager.GetAllCountries();
CountryComboBox.DataSource = country_list;
CountryComboBox.DisplayMember = "Name";
CountryComboBox.ValueMember = "CountryID";
}