Form 1
on Button Click Event
private void button1_Click(object sender, EventArgs e)
{
Form2 abc = new Form2(Convert.ToInt16(comboBox1.SelectedValue));
abc.Show();
}
Form 2
Create new Constructor For Same name of Form
public Form2()
{
InitializeComponent();
}
public Form2(int ab)
{
InitializeComponent();
textBox1.Text = ab.ToString();
}