private void DeleteCountryButton_Click(object sender, EventArgs e)
{
var selectedRows = CountryTable.SelectedRows;
foreach (DataGridViewRow row in selectedRows)
{
int id = Convert.ToInt32(row.Cells[0].Value);
CountryManager.DeleteData(id);
OriginCountry local = CountryList.Find(x => x.Id == id);
CountryList.Remove(local);
}
UpdateOriginCountryTable();
}