5,455 questions
I managed to solve the problem! Adding App.xaml code to redeploy solved!
<Application.Resources>
<XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
</Application.Resources>
Failed to add *** to UIElementCollection. Unspecified error
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 86%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ED%3C/text%3E%3C/svg%3E)
聊妹 Dark
15
Reputation points
Failed to add *** to UIElementCollection. Unspecified error
XDG001
Developer technologies | Visual Studio | Other
{count} votes
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Viorel 122.6K Reputation points2023-10-29T16:16:12.27+00:00 Seems to be a problem of Visual Studio. If it is reproducible, maybe it can be reported:
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(249.60000000000002, 10%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAX%3C/text%3E%3C/svg%3E)
Anna Xiu-MSFT 31,056 Reputation points Microsoft External Staff2023-10-30T06:52:33.0766667+00:00 Hello, which version of Visual Studio are you using? Could you tell me how you encountered this situation?
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聊妹 Dark 15 Reputation points
2023-10-30T10:56:10.5166667+00:00 17.7.6, It's just that there is a problem with adding the Microsoft.UI.Xaml control
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聊妹 Dark 15 Reputation points
2023-10-30T11:02:03.07+00:00 I'll send you a screenshot to show you
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1 answer
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聊妹 Dark 15 Reputation points
2023-10-30T11:15:12.23+00:00 -
Anna Xiu-MSFT 31,056 Reputation points Microsoft External Staff
2023-11-01T03:33:37.2333333+00:00 Thanks for your sharing!
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(60.8, 72%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETM%3C/text%3E%3C/svg%3E)
THE MADNESS 0 Reputation points2025-02-27T06:32:07.6166667+00:00 I was banging my head all over Nuget trying to fix this, Thank you so much!
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