c# - NHibernate: Create iCriteria without session -

i want construct icriteria's , pass on function. function open session , transaction. function executes icriteria.list(); , returns list of objects, code below.

i want because want write using(isession session = ... , using(itransaction transaction = ... once collecting list of objects. otherwise repeating myself many times.

    /// <summary>     /// executes icriterion in new session using transaction.     /// </summary>     /// <typeparam name="t">the type of object operate on.</typeparam>     /// <param name="criterion">the criterion list of objects by.</param>     /// <returns>the result of <c>(list<t>)session.createcriteria(typeof(t)).add(criterion).list()</c></returns>     public static list<t> criteriontolist<t>(icriterion criterion)     {         list<t> objects = default(list<t>);         using (isession session = sessionfactory.opensession())         {             using (itransaction transaction = session.begintransaction())             {                 objects = (list<t>)session.createcriteria(typeof(t)).add(criterion).list<t>();                 transaction.commit();             }         }         return objects;     } 

the thing icriteria.add() accepts icriterion.

the question

icriterion not have .add(.. can't this:

icriterion criterion = restrictions.eq(property, value).add(... 

how can still achieve this, should cast icriteria first so?

icriterion criterion = ((icriteria)restrictions.eq(property, value)).add(... 

note: problem converting huge project uses datatables strong typed objects (compatible nhibernate). have many, many compile errors prevents me testing code without converting whole project first.

i think can achieve detachedcriteria. syntax , usage this:

var det = detachedcriteria.for<t>.add(restrictions.eq(prop, val)); using (var session = config.opensession()) using (var txn = session.begintransaction()) {     var result= det.getexecutablecriteria(session).list(); } 

you encapsulate transaction in separate function:

public ilist<t> getlist<t>(detachedcriteria detachedcriteria) {     ilist<t> result;     using (var session = config.opensession())     using (var txn = session.begintransaction())     {         result = detachedcriteria.getexecutablecriteria(session).list<t>();         txn.commit();     }     return result; }