UnauthorizedAccessException in StorageFile.OpenAsync

Question

I used the following code to download/save an image and open it later, but in later OpenAsync, it throws the UnauthorizedAccessException, it seems that the file is not close

Answer 1

I had the same issue and had to explicitly dispose the stream and file objects before it would complete.

    var file = await ApplicationData.Current.LocalFolder.CreateFileAsync(filename, Windows.Storage.CreationCollisionOption.ReplaceExisting);
    using (var fs = await file.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite))
    {
        var outStream = fs.GetOutputStreamAt(0);
        var dataWriter = new Windows.Storage.Streams.DataWriter(outStream);
        dataWriter.WriteString("Hello from Test!");
        await dataWriter.StoreAsync();
        dataWriter.DetachStream();
        await outStream.FlushAsync();
        outStream.Dispose(); // 
        fs.Dispose();
    }