Force terminate a WPF application -

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this question has answer here:

i need terminate running wpf application (e.g. wpf.exe). app did override onclosing event doing following 

protected override void onclosing(canceleventargs e) {           e.cancel = true; }

i tried "taskkill /f /im wpf.exe" still doesn't terminate it. how can force terminate app?

rather doing 

    protected override void onclosing(canceleventargs e) {           e.cancel = true; }

try 

void window_closing(system.componentmodel.canceleventargs e) {     iclosing context = datacontext iclosing;     if (context != null)     {         e.cancel = !context.onclosing();     } }

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