cheched value from checkbox show one by one on label

Question

protected void ddsize_SelectedIndexChanged(object sender, EventArgs e)

{

List<String> lbl_Size = new List<string>();

List<String> lbl_Size1 = new List<string>();

foreach (System.Web.UI.WebControls.ListItem item in ddsize.Items)

{

if (item.Selected)

{

lbl_Size.Add(item.Text);

lbl_Size1.Add(item.Text);

lbl_size1.Text = " $: " + String.Join(",", lbl_Size.ToArray());

lbl_size2.Text = " $: " + String.Join(",", lbl_Size.ToArray());

lbl_size1.Visible = true;

lblprice.Visible = true;

txt_price.Visible = true;

txt_pricesize2.Visible = true;

lbl_size2.Visible = true;

}

}

}