using statement usage in C# -

i have doubts regarding using statement:

i have class called

myjob disposable. have property on myjob jobresults disposable.

my code:

using (myjob job = new myjob()) {     //do something.       formatresults(job.jobresults) }  public string formatresuls(jobresuts results) { } 

my first question is: in case after using block both myjob , myjob.results disposed or myjob , not myjob.results?

i performing parallel processing w.r.t tasks in c#:

tasks alltasks = list<tasks>  try {    foreach(task t in alltasks)    {          // each tasks makes use of idisposable object.         t.start();    }     task.waitall(alltasks); } catch(aggregateexecption aex) {     /// how ensure idisposables disposed if     exception happens in of tasks? } 

my second q, in code above, proper way ensure dispose off objects correctly when handling exceptions in tasks?

sorry if questions naive or confusing, still trying learn , understand c#. guys!

are both myjob , myjob.results disposed or myjob , not myjob.results?

that subjective implementation of dispose method. haven't seen in question, i'll assume aren't disposing result property in myjob.dispose, hence latter.

as myjob wrapped in using statement, , again assuming nothing result property, disposed opposed results, isn't wrapped in using statement.

you decide myjob, encapsulates result property, responsible disposable of well. if decide so, can dispose results in myjobs.dispose.

what proper way ensure dispose off objects correctly when handling exceptions in tasks?

if delegate passed task wrapped in using statement, safe, since using transform code try-finally block, if exception occurs in using block, finally block still run yourobject.dispose.