Web Part Properties as Custom Dropdown menu

HI,

i have this dropdown and i want to use ti in the Webpart properties is it possible?

    using (SPSite oSite = new SPSite(this.strSiteURL))
            {
                using (SPWeb oWeb = oSite.OpenWeb())
                {

                    foreach (SPList list in oWeb.Lists)
                    {
                        ListNameDD.Items.Add(list.ToString());
                        string SelectedList = ListNameDD.SelectedItem.ToString();
                        strListName = SelectedList;


                    }
                    oWeb.Dispose();