Now we have the RadialProgressBar control, it could be interesting to add a IsIndeterminate property on it. So, we can reproduce the XBox progress bar.
Interesting idea. Do you have a screenshot (or even better, a gif) to link to this?
What about that?

I will try to make a video or a gif when I can but you can see this UI control on Xbox One or even in the Xbox app for Windows 10. I suppose it uses Accent color.
I just hit this trying the control out in the new sample app.
@Odonno a gif would be nice to see how it differentiates from the built-in ProgressRing.
I just found a video. :) https://youtu.be/x8wkFfbhYhQ?t=1m7s
Discussion about doing something like this in the PR
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How is this different from ProgressRing?
@Vijay-Nirmal It's the same thing. Just different look. And it feels more Fluent design-like to me.
Then as we discussed, we can make styles library. We can restyle ProgressRing. Here are some restyled ProgressRing from UWP-Styles-Library


I agree. Restyling existing controls should be the promoted approach for something like this.
Whats the status? Can we archive/close it?
Sorry. Issue closed.
Re-opening from a discussion on the UWP discord server. Also, the control inherits from ProgressBar, so we should still try and support the IsIndeterminate property from there.
WinUI has added determinate progress to the ProgressRing control: https://github.com/microsoft/microsoft-ui-xaml/pull/2584
Plan is to deprecate our RadialProgressBar in 7.0 now.
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Then as we discussed, we can make styles library. We can restyle
ProgressRing. Here are some restyledProgressRingfrom UWP-Styles-Library