display data from form1 datagridview selected row to form2

    public partial class Form1 : Form
    {
        public delegate void mydelegate(string message);

        public event mydelegate myEvent;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            myEvent("some data");
        }   
    }

form2 which calls form1 and expects to receive data from it:

    public partial class Form2 : Form
    {
        private int counter = 0;

        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form1 myform = new Form1();
            myform.myEvent += respondEvent;
            myform.Show();
        }

        private void respondEvent(string message)
        {
            counter++;
            this.button1.Text = counter.ToString();
        }
    }