getting sum of text from all the dynamically generated control

Question

i have a windows form in which there are controls listed below panel1 button1 = add new mobiles button2 = ok When clicking on button1 an usercontrol is added. Y

Answer 1

 int sum = 0;
        panel1.Controls.OfType().ToList().ForEach(
            x =>
            {
                TextBox ctl = x.Controls.OfType().Where(y => y.Name == "textbox2").FirstOrDefault();
                sum += (ctl == null ? 0 : (!String.IsNullOrEmpty(ctl.Text.Trim()) ? Convert.ToInt32(ctl.Text.Trim()) : 0));
            }
            );