Universal Windows Platform (UWP)
A Microsoft platform for building and publishing apps for Windows desktop devices.
2,903 questions
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For Java, we have Platfrom.runlater(); to waiting UI.
But for C# I didn't find something same.
Now I need to wait for the UI loading completed and after that do something such as output a node's actualsize.
There is a loading control in the windows community toolkit you can use
https://learn.microsoft.com/en-us/windows/communitytoolkit/controls/loading