c# - Using Auto reset event is not working as expected -

i quite new c# programming, trying achieve following result failing so.

what expect -: on click event of button, want open applciation via api, run analysis , exit application. while running application have progress bar on form should keep going 0 - 100 till runanalysis() method called through api gets executed, when gets executed progress bar should show 100% , application called through should exit

what happening -:

the runanalysis() being executed , application exits, click event of button gets executed , progress bar moves 0 - 100 should not happen

what attempt

namespace trialapp {     public partial class form1 : form     {         autoresetevent obj = new autoresetevent(false);          public form1()         {             initializecomponent();         }          etabs2015.csapmodel sapmodel;         system.reflection.assembly etabsassembly;         etabs2015.coapi etabsobject;         int result = -1;         delegate int mydelegate();         mydelegate pointer = null;          private void button1_click(object sender, eventargs e)         {             //use ret check return values of oapi calls              int ret;              //dynamically load etabs.exe assembly program installation folder              string pathtoetabs = system.io.path.combine(environment.getenvironmentvariable("programfiles"), "computers , structures", "etabs 2013", "etabs.exe");             etabsassembly = system.reflection.assembly.loadfrom(pathtoetabs);              //create instance of etabsobject , reference coapi interface             etabsobject = (etabs2015.coapi)etabsassembly.createinstance("csi.etabs.api.etabsobject");              //start etabs application             ret = etabsobject.applicationstart();              //get reference csapmodel access oapi classes , functions             sapmodel = etabsobject.sapmodel;              //initialize model             ret = sapmodel.initializenewmodel();              //create steel deck template model             ret = sapmodel.file.newsteeldeck(4, 12, 12, 4, 4, 24, 24);              //save model             system.io.directory.createdirectory("c:\\etabsapi");             ret = sapmodel.file.save("c:\\etabsapi\\example2.edb");              //run analysis             backgroundworker1.runworkerasync();            // ret = sapmodel.analyze.runanalysis();               obj.waitone();              //close etabs             ret = etabsobject.applicationexit(false);              //clean variables             sapmodel = null;             etabsobject = null;              //check ret value              if (ret == 0)             {                 messagebox.show("api script completed succesfully.");             }             else             {                 messagebox.show("api script failed complete.");             }          }          public void afterrunanalysiscomplete(iasyncresult resultholder)         {             result = pointer.endinvoke(resultholder);          }          private void backgroundworker1_dowork(object sender, doworkeventargs e)         {             pointer = new mydelegate(sapmodel.analyze.runanalysis);              iasyncresult flag = pointer.begininvoke(new asynccallback(afterrunanalysiscomplete), null);              while (!flag.iscompleted)             {                 (int = 0; <= 100; i++)                 {                      thread.sleep(100);                     backgroundworker1.reportprogress(i);                     if (i == 100)                     {                         = 0;                     }                     if (flag.iscompleted)                     {                         break;                     }                 }             }              backgroundworker1.reportprogress(100);             //obj.set();           }          private void backgroundworker1_progresschanged(object sender, progresschangedeventargs e)         {             progressbar1.value = e.progresspercentage;         }     } } 

can 1 tell me going wrong?

edit -:

i tried not using waitone() , putting code followsbackgroundworker1.runworkerasync(); in backgroundworker1_dowork method, not want extent of main project , not make sense design of classes.

the problem, see it, when kick off

ret = etabsobject.applicationstart(); 

it's going start in new thread, program isn't going have access to. recommend starting application in taskfactory, can use while check if task still running , update progress bar.

maybe this:

var etabapp = task.factory.startnew(() => { etabsobject.applicationstart()});  while(etabapp.status == taskstatus.running) {    //do check percent complete , update progress bar }