c# - BackgroundWorker not working with TeamCity NUnit runner -

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i'm using nunit test view models in wpf 3.5 application , i'm using backgroundworker class execute asynchronous commands.the unit test running fine nunit runner or resharper runner fail on teamcity 5.1 server.

how implemented :

i'm using viewmodel property named isbusy , set false on backgroundworker.runworkercompleted event. in test i'm using method wait backgroundworker finish : 

protected void waitforbackgroundoperation(viewmodel viewmodel) {     console.writeline("waitforbackgroundoperation 1");     int count = 0;     while (viewmodel.isbusy)     {         console.writeline("waitforbackgroundoperation 2");         runbackgroundworker();         console.writeline("waitforbackgroundoperation 3");          if (count++ >= 100)         {             assert.fail("background operation long");         }         thread.sleep(1000);          console.writeline("waitforbackgroundoperation 4");     } }  private static void runbackgroundworker() {     dispatcher.currentdispatcher.invoke(dispatcherpriority.background, new threadstart(delegate { }));     system.windows.forms.application.doevents(); }

well, works , hangs build. suppose it's application.doevents() don't know why...

edit: added traces (see code above) , in log have :

waitforbackgroundoperation 1  waitforbackgroundoperation 2  waitforbackgroundoperation 2  waitforbackgroundoperation 2 ...

how possible ?!

you launching bunch of background tasks, 1 per second. move runbackgroundworker above loop.

protected void waitforbackgroundoperation(viewmodel viewmodel) {     console.writeline("waitforbackgroundoperation 1");     runbackgroundworker();     thread.sleep(100); // wait thread set isbusy, may not needed     int count = 0;     while (viewmodel.isbusy)     {         console.writeline("waitforbackgroundoperation 2");         if (count++ >= 100)         {             assert.fail("background operation long");         }         thread.sleep(1000);         console.writeline("waitforbackgroundoperation 3");     } }  private static void runbackgroundworker() {     dispatcher.currentdispatcher.invoke(dispatcherpriority.background, new threadstart(delegate { })); }

the doevents should not needed.


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