Need help with multiple forms

Add a new class to your project and name it Choise
public class Choise
{
   public static bool Alternative;
}
In form 2:
Add this block
if(radio1.checked)
{
   Choise.Alternative = true;
}
if(radio2.checked)
{
   Choise.Alternative = false;
}
In the Form1
add this:
in the button event handler add this
Form2 oForm = new Form2();
oForm.Show();
oForm.dispose +=  this.Disposed +=new EventHandler(Form2_Disposed);

implement the
public Form2_Disposed(Object sender , EventArgs e)
{
  if(Choise.Alternative == true) label.Text = "put what you awant here";
 if(Choise.Alternative == false) label.Text = "put what you want here";
 
}