wpf - Issues with Galasoft Messenger class in multi threaded environment -

i have 2 classes lets classa , classb. have communicate of galasoft messenger class. in classa, have following code :-

class :

messenger.default.register<notifyinterface>(this, performaction);  private void performaction(notifyinterface objnotify) {    switch(objnotify.someproperty)    {     case "a":        //        break;     case "b":        // else        break;     } } 

from classb want send parallel notifications of messenger i.e. want execute 'case a' , 'case b' parallely. doing this.

classb:

system.threading.threadpool.queueuserworkitem((object context) =>         {             messenger.default.send<notifyinterface>(objnotifycasea);                         }, null);  messenger.default.send<notifyinterface>(objnotifycaseb); 

but second notification not received until first 1 gets over. limitation of messenger class 2 notifications cannot sent in parallel?

well, not sure whether bug or by-design, yes - messenger locks while sending messages (for instance, if you'll try send message within message's handler you'll dead-lock).

the issue discussed @ mvvm light toolkit project site , solution proposed this pull request, afaik not yet confirmed , merged trunk.

as temporary workaround until new version of toolkit released can sources , apply changes mentioned above - solve issue.