The application crashes if the same content is displayed twice in WindowNotificationManager

[afunc233]

Describe the bug

this pr #15628 use a Dictionary<object, NotificationCard> to interim storage . but Key of Dictionary should unique. crashes happend

To Reproduce

ControlCatalog.NetCore

Expected behavior

solve the problem

Avalonia version

last master

OS

No response

Additional context

No response

[timunie]

/cc @wieslawsoltes

[emmauss]

content, which is the key for the notification, can be any avalonia content that can be rendered, including Visual. If it isn't unique, it will still cause errors when the content is attached to the visual tree multiple times, as you can't attach a visual more than once.

[afunc233]

yep , so i can't fix it , But it's still a problem, isn't it?

[timunie]

@afunc233 in my understanding it is an issue. Sure the same visual can't be shown twice. The same content can however be shown twice if DataTemplates are used. Need to check the sample carefully.

[emmauss]

Yes, it is still an issue.