public delegate void dname();
        class DelegateDemo
        {
            public void m1()
            {
                MessageBox.Show("From m1");
            }
        }

private void button1_Click(object sender, EventArgs e)
        {
            DelegateDemo obj = new DelegateDemo();
            dname d1 = new dname(obj.m1);
            d1();
        }