asp.net - ObjectDisposedException While using Include - why? -

my page calls services layer method uses generic repository "find" method. in services layer method, following:

 using (iunitofwork unitofwork = new dbcontext())                 {                     genericrepository<operator> operatorrepos = new genericrepository<operator>(unitofwork);                     {                         try                         {                             var oper = operatorrepos.find(o => o.operatorid == operatorid).include(o => o.cmn_address).single();                             return oper;                         }                         catch (invalidoperationexception exc)                         {                             //handle exception                         }                     }                 } 

the find method repository:

public iqueryable<t> find(func<t, bool> predicate)         {             return _objectset.where<t>(predicate).asqueryable();         } 

on page, try access cmn_address navigation property of operator , following error:

the objectcontext instance has been disposed , can no longer used operations require connection.

i realize caused using statement dispose of context, thought include method eager load cmn_address object. don't understand why doesn't work expected.

you using func<> instead of expression<func<>> in condition. makes linq-to-objects. change permanent. calling asqueryable doesn't make linq-to-entities again.