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protected void Page_Load(object sender, EventArgs e)
{
var pnl1 = new PlaceHolder() { ID = "ph1" };
form1.Controls.Add(pnl1);
for (int i = 0; i < 10; i++)
pnl1.Controls.Add(new TextBox() { ID = "txt" + i, Text = i.ToString() });
}
protected void btnAdd_Click(object sender, EventArgs e)
{
(form1.FindControl("ph1") as PlaceHolder).Controls.Cast<Control>().ToList().ForEach(
c =>
{
Response.Write((c as TextBox).Text + ", ");
});
}