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As I am upgrading my uwp app to WindowsAppSDK and WinUI3 desktop app, I got this exception of Permission denied on PublisherCacheFolder. And it was working fine in uwp. I intend to package the app with msix so I will still technically upload it to store.

Just to clarify I do have folder names in package file in Extensions thats how it was working fine in uwp

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Muhammad Touseef
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2 Answers2

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Fixed it by reinstalling the app, dont know why but it had to do something with existing uwp version of the app being overriden with this windowsAppSDK version of the app under same publisher

Muhammad Touseef
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I had the same problem while migrating an app from UWP to WinUI3. In my case a found a workaround by using System.IO.File to read and write content from Publisher folder and avoid the UnauthorizedAccessException. And of course, I have the folder included the Package manifest Extensions.

var folder = ApplicationData.Current.GetPublisherCacheFolder("Folder1");
System.IO.File.WriteAllText(System.IO.Path.Combine(folder.Path, "test.txt"), "test");
var testContent = System.IO.File.ReadAllText(System.IO.Path.Combine(folder.Path, "test.txt"));

Hope that helps.

Iván Falletti
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