[UWP][C++/CX] Page destructor not called after close app why?

isrepeat 1

I have following code:

public ref class MainPage sealed
{
public:
    MainPage()
    {
        int a = 1;
    }
private:
    ~MainPage()
    {
        int b = 2;
    }
};

Why the destructor MainPage is not called when I close app?

However when change MainPage on other Page due to Navigate destructor MainPage is called.
It's normal for uwp not calling destructor current page when we closing app?
How i can foreced call destructor if i want?

Viorel 112.1K Reputation points

2021-04-09T10:03:41.793+00:00

How did you check it?
isrepeat 1 Reputation point

2021-04-09T11:34:16.22+00:00

I put breakpoint in destructor and programm never entered there ...
Roy Li - MSFT 31,826 Reputation points Microsoft Vendor

2021-04-12T06:55:17.367+00:00

Could you please tell me your concerns? Does the destructor lead to unexpected behavior when you closed your app?
isrepeat 1 Reputation point

2021-04-14T11:29:20.247+00:00

I was just expecting the destructor body will execute when I close app. But, as I understand it, Windows exits the application by calling something like "exit(0);" and, therefore, no destructors are executed. I just tested it on a small console app by calling "exit(0);" before "return 0;" in main() and behavior was similarly.
Roy Li - MSFT 31,826 Reputation points Microsoft Vendor

2021-04-15T06:57:52.507+00:00

It looks like it's by design. Did you call delete manually to test whether the destructor works? Check this: Destructors.
isrepeat 1 Reputation point

2021-04-15T20:11:45.233+00:00

Yes, the destructor C++/CX normal works if use delete or scope-life.
As I wrote above: "However when change MainPage on other Page due to Navigate destructor MainPage is called."

It looks like it's by design.

Yes, maybe.