convert request.querystring todatetime following fetch controlling datacontext linq c# asp.net

i wanna timedate value another page controlling request.querystring following an query review lift adult relating datas. duty query linq is:

   stable vacant user_querytime()
    {
    dataclasses2datacontext dc1 = new dataclasses2datacontext();
    twine  information = request.querystring["timeofmessage"];

                var query7 = u dc1.syncback_logs
                             where u.timeofmessage = data
                             orderby u.timeofmessage descending
                             name u;
                gridview1.datasource = query7;
                gridview1.databind();
    }

here "request.querystring["timeofmessage"]" i datetime (ex:8/25/2008 9:07:19 am). i wanted review opposing "u.timeofmessage" database lift adult relating records.

when i todatetime duty modify twine datetime ,the value returned bool hence means review opposing "timeofmessage" datetime format database. anyone assistance me this?