Mine

    protected void DropDownList3_Init(object sender, EventArgs e)
    {
        int iStartYear = 1900;
        for (int i = 0; i <= DateTime.Now.Year; i++)
        {
            int iCurrentYear = iStartYear + i;
            if (iCurrentYear != DateTime.Now.Year && iCurrentYear < DateTime.Now.Year)
            {
                this.DropDownList3.Items.Add(iCurrentYear.ToString());
            }
        }
        DropDownList3.SelectedIndexChanged += new EventHandler(DropDownList3_SelectedIndexChanged);
    }