how to add year in drop down from past 2 year till present year in asp.net c#

HTML

<asp:DropDownList ID="ddlYear" runat="server" >
</asp:DropDownList>

c# code

protected void Page_Load(object sender, EventArgs e)
    {
       
            if (!Page.IsPostBack)
{
 for (int i = DateTime.Now.Year; i >= 2016; i--)
            {
                ddlYear.Items.Add(i.ToString());
               
            }
            ddlYear.Text = DateTime.Now.ToString("yyyy");
}
}