public Car(CarMarka marka, string model, decimal potroshuvachka, int cena)
{
Marka = marka;
Model = model;
Potroshuvachka = potroshuvachka;
Cena = cena;
}
private void btnDodadi_Click(object sender, EventArgs e)
{
marka = new CarMarka(txtCode.Text, txtName.Text);
DialogResult = DialogResult.OK;
}