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https://learn.microsoft.com/en-us/answers/questions/527651/winui-3(c-winrt)-navviewcompactmodethresholdwidth WinUI 3(C++/WinRT): "NavViewCompactModeThresholdWidth" not found - Microsoft Q&A According to the sample code of the the document in Microsoft Learn, I wrote almost the same code, but it cannot be compiled. There is an error,... not foundwinuicwinrtq