iOS: Unable to create file within app sandbox

[dmirmilshteyn]

Describe the bug

When trying to create a file within a directory that is part of the app (such as the Documents directory), it returns a null file and the file is not created. This happens only when using IStorageFolder::CreateFileAsync. Creating the file using regular File.Create calls works successfully.

I suspect this is because of this check. StartAccessingSecurityScopedResource will return false if the user is unable to access the resource OR if the resource is already in the app sandbox (such as the documents folder).

Other file operations succeed because they don't check the result of StartAccessingSecurityScopedResource.

To Reproduce

• Access the app documents folder
• Attempt to create a test file within that directory
• The test file will not be created

var documents = await storageProvider.TryGetWellKnownFolderAsync(WellKnownFolder.Documents);
var test = await documents.CreateFileAsync("test.txt");
// test is null, it should have been created

Expected behavior

No response

Avalonia version

11.3.4

OS

iOS

Additional context

No response