Передача между формами при showdialog

public event EventHandler<string> MyEvent;
        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.Owner = this;
            f2.Show();
            MyEvent += f2.f2_MyEvent;
            if (MyEvent != null) MyEvent(this, textBox1.Text);
            
        }

public void f2_MyEvent(object sender, string e)
        {
            label1.Text = e;
        }

public event EventHandler<string> MyEvent;
        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.Owner = this;
            f2.Show();
            MyEvent += f2.f2_MyEvent;
            if (MyEvent != null) MyEvent(this, "1", "2", "3", "4", "5");
            
        }

public void f2_MyEvent(object sender, string a, string b, string c, string d, string e)
        {
            label1.Text = a;
            label2.Text = b;
                 ...
        }

public event EventHandler<List<string>> MyEvent;
///............................................
MyEvent(this, new List<string>() { "1", "2", "3" });
///............................................
public void f2_MyEvent(object sender, List<string> e)
        {
            label1.Text = e[0];
            label2.Text = e[1];
        }