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System.Messaging.MessageQueueException was unhandled : A workgroup installation computer does not support the operation.

If you play with MSMQ and get an exception like

System.Messaging.MessageQueueException was unhandled
Message=A workgroup installation computer does not support the operation.
Source=System.Messaging
ErrorCode=-2147467259
StackTrace:
at System.Messaging.MessageQueue.ResolveFormatNameFromQueuePath(String queuePath, Boolean throwException)
at System.Messaging.MessageQueue.get_FormatName()
at System.Messaging.MessageQueue.ReceiveCurrent(TimeSpan timeout, Int32 action, CursorHandle cursor, MessagePropertyFilter filter, MessageQueueTransaction internalTransaction, MessageQueueTransactionType transactionType)
at System.Messaging.MessageQueue.Receive()
…

It might be due to a reason like mine.

With

 

var queues = MessageQueue.GetPrivateQueuesByMachine(“.”);
var queue = queues.Where(q => q.QueueName == “private$\\mynewqueue”).Single();
var message = queue.Receive();

it does work
but with

 

var queue = new MessageQueue(“private$\\mynewqueue”);
var message = queue.Receive();

it doesn’t.

Change to

 

var queue = new MessageQueue(“.\\private$\\mynewqueue”);
var message = queue.Receive();

and you might be good to go again.

I haven’t bothered to figure out exactly why but my workaround might help you.