c# - How can I ensure that InvokeRequired will not aborted? -

this code:

foreach (var pathcartella in folderlist) {     try     {         // operation          if (txtmonitor.invokerequired)         {             txtmonitor.begininvoke(new methodinvoker(delegate { txtmonitor.appendtext(pathcartella + environment.newline); }));         }     }     catch (exception err)     {         // operation         return;     } } 

but notice that, if catch exception, return can act before txtmonitor.invokerequired has been sent ui, , lost "message".

how can avoid this?

if understand requirements correctly, can use third part of try/catch block - finally

the block useful cleaning resources allocated in try block. control passed block regardless of how try block exits. statement takes following form:

so code change of form:

foreach (var pathcartella in folderlist) {     try     {         // operation       }     catch (exception err)     {         // operation         return;     }         {         if (txtmonitor.invokerequired)         {             txtmonitor.begininvoke(new methodinvoker(delegate { txtmonitor.appendtext(pathcartella + environment.newline); }));         }     } } 

a couple of notes - sure want run if invokerequired true? if running simple button click, example, , not background thread, invokerequired false , code never execute.

if wondering whether called, particular question has been asked many times. see if return out of try/finally block in c# code in run? example. has interesting counter-examples.

the other option consider throw exception. pass pathcartella part of error message, know path exception happened on, , exception was. caller can handle this. example:

foreach (var pathcartella in folderlist) {     try     {         // operation       }     catch (exception err)     {         // operation          //the original exception becomes inner exception (so can original         //error , stack trace etc). new exception message contains path.         throw new exception(             string.format("failed perform operation on '{0}'", pathcartella),              err);      }  }