How to format Date in Linq To Sql Query ?

Hi All,
I try to format date dd-MM-yy in linq to sql query using statement Convert.ToDateTime(E.wodate).ToString("dd-MM-yy")  ,but it produces an error
Method 'System.String ToString(System.String)' has no supported translation to SQL. Here is the code
var workorder = from E in db.qryWOs where E.wodate >= DateTime.Parse(sTGL1) && E.wodate <= DateTime.Parse(sTGL2) select new { E.wono, wodatez = Convert.ToDateTime(E.wodate).ToString("dd-MM-yy"), E.vesselname, E.picname, E.statusdesc, E.workplace, E.workedby, E.wotitle, E.problem, E.rootcause, E.correctiveaction, E.wotypedesc, E.delay, E.closingdate, E.reference, E.verifiedbynm, E.closebynm, E.workduration, E.lastupdat ...