public void executeDistributedTaskAsync()
{
MerchantByCategoryTask task = new MerchantByCategoryTask(
ECategoryType.AUTOMOTIVE);
IAsyncResult <List <Merchant> > asyncResult = proxy.BeginExecute(task, null /*callback*/, null /*state object*/);
// ...
//This will block until the result execution has arrived
asyncResult.AsyncWaitHandle.WaitOne();
//Gets the actual result of the async execution
List <Merchant> result = proxy.EndExecute(asyncResult);
}