MVC Dropdownlist:

You can try it


            select
            first
            second
         
       


 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (DropDownList1.SelectedValue.ToString()== "1")
            {
                Label1.Visible = true;
                Label1.Text = "You have selected"+" "+DropDownList1.SelectedItem;
            }

            else if (DropDownList1.SelectedValue.ToString() == "2")
            {
                Label1.Visible = true;
                Label1.Text = "You have selected" + " " + DropDownList1.SelectedItem;
            }
            else
            {
                Label1.Visible = true;
                Label1.Text = "You have selected" + " " + DropDownList1.SelectedItem;
            }
        }