How can I use the class toastnotificationhistorycompat (from microsoft.toolkit.uwp.notifications) ?

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C#

Dear All,

i use the Microsoft.Toolkit.Uwp.Notifications package to handle Toast Notifications. Works well so far.
Now i want to have more control over the notifications - hiding / updating them.

Therefore i need e.g. the Class ToastNotificationHistoryCompat.

I want to use ToastNotificationHistoryCompat.Clear() for clearing all notifications of my app or ToastNotificationHistoryCompat.Remove("<tag>") for removing a special notification.

But i didn't have success so far.

I'm relatively new to C#, so probably i didn't understand some basics about class handling, so i beg your insulgance ;-)

Thank you + Best regards
Emanuel

What I have tried:

First i thought i have to handle it as an abstract class (without instance), so i tried

public static ToastNotificationHistoryCompat tnh;
...
tnh.Clear();

But the error message told me that "he" expected an instance.
("Object reference not set to an instance of an object.")

So i tried

ToastNotificationHistoryCompat tnh;
tnh.Clear();

Didn't work.

I tried to find a constructor (".new()"), but i have currently no idea how to handle the class ToastNotificationHistoryCompat and its methods.