private void dgvKiralama_DoubleClick(object sender, EventArgs e)
        {
            cArac a = new cArac();
            cKira b = new cKira();
            btnSonlandir.Enabled = true;

            if (rbBireysel.Checked == true)
            {

                a.AracGetirKiraSonlandir(dgvKiralama, a);
                txtAracID1.Text = a.AracID.ToString();

            }

            if (rbKurumsal.Checked == true)
            {
                int i = 1;
                List<cKira> list = new List<cKira>();
                b.AracDetayIDGetir(dgvKiralama, b);
                txtKiraDetayID.Text = b.KiraDetayID.ToString();
                list = b.KiralananGetirKurumsalByKiraDetayID(b);
                foreach (var item in list)
                {
                    if(i==1)
                    (txtAracID1).Text = item.AracNo.ToString();
                    if(i==2)
                    (txtAracID2).Text = item.AracNo.ToString();
                    if(i==3)
                    (txtAracID3).Text = item.AracNo.ToString();

                    i++;
                }
            }
        }