private void button1_Click(object sender, EventArgs e)
{
if (yeni == null)
{
yeni = new markasec();
}
yeni.aracsecildi += yeni_markasecildi;
yeni.ShowDialog();
}
private void button2_Click(object sender, EventArgs e)
{
Form ac = new MarkaStok(this.comboBox1);
ac.ShowDialog();
Form mrk = new markasec();
mrk.ShowDialog();
}