DateTime Format yyyymm

I've found every DateTime format you can think of except the one I need: yyyymm. How do I go about getting this? I have the following code I'm working with: ``` List <string> routines = new List<string>(); routines.Add("1 - Routine"); routines.Add("6 - Planned Outage"); int year = 2011; int quarter = 1; DateTime timeframe = new DateTime(year, (quarter * 3), 01).AddMonths(1); var results = (from wo in WORKORDERs join wot in WORKORDERTYPEs on wo.Wot_oi equals wot.Wotyoi join pri in PRIORITies on wo.Prio_oi equals pri.Priooi join s in SITEs on wo.BEparn_oi equals s.Siteoi where wo.Audt_created_dttm.Value.Year >= year - 3 && wo.Audt_created_dttm.Value.Year >= 2006 && wo.Audt_created_dttm < timeframe && (s.Id =="NM" || s.Id == "TH") && !wot.Id.Contains("stand") && !(wo.Ci_cnc_date != null && pri.Prioid != "1 - Routine" && pri.Prioid != "6 - Planned Outage") && (SqlMethods.Like(pri.Prioid, "1%") || SqlMethods.Like(pri.Prioid, "2%") || SqlMethods.Like(pri.Prioid, "3%")) select new {PM = wo.Wosource, Site = s.Id, Priority = pri.Prioid, Worktype = wot.Id, WoNumber = wo.Id, Description = wo.Aenm, CreateDate = wo.Audt_created_dttm, CloseDate = wo.Clsdt_date, MonthNum = String.Format("{0:yyyy mm}", wo.Clsdt_date), Planning = routines.Contains(pri.Prioid) ? "Planned" : "Unplanned"}); ``` I tried using: ``` MonthNum = String.Format("{0:yyyy mm}", wo.Clsdt_date) ``` and that gives me the year correctly but the months are all 00. I'm guessing this is because the format for wo.Clsdt_date is different than my string format (it's mm/dd/yyyy). Any ideas?