how to fill drop down list from hash table in asp.net

 DateTime dt = DateTime.Now;
                string s1 = dt.ToString("dddd, d MMM ");
                DateTime dt1 = dt.AddDays(1);
                string s2 = dt1.ToString("dddd, d MMM ");
                DateTime dt2 = dt.AddDays(2);
                string s3 = dt2.ToString("dddd, d MMM ");
                DateTime dt3 = dt.AddDays(3);
                string s4 = dt3.ToString("dddd, d MMM ");
                Hashtable ht = new Hashtable();

                string s5 = dt.ToString("yyyy-MM-dd");
              
                string s6 = dt1.ToString("yyyy-MM-dd");
              
                string s7 = dt2.ToString("yyyy-MM-dd");
            
                string s8 = dt3.ToString("yyyy-MM-dd");
              
                ht.Add(s5, s1);
                ht.Add(s6, s2);
                ht.Add(s7, s3);
                ht.Add(s8, s4);


                ddldate.DataSource = ht;
                ddldate.DataTextField = "value";
                ddldate.DataValueField = "key";
                ddldate.DataBind();