c# - SharpCompress.Rar IEntry解压，写入StorageFile

Question

// Create buffer
byte[] buffer = new byte[entry.Size];
// Create a file to store the contents 
StorageFile file = await extractFolder.CreateFileAsync(Path.GetFileName(entry.Key), CreationCollisionOption.ReplaceExisting);
// Store the contents 
using (IRandomAccessStream randomStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
    using (Stream outstream = randomStream.AsStreamForWrite())
    {
        using (var ms = new MemoryStream())
        {
            reader.OpenEntryStream().CopyTo(ms);
            buffer = ms.ToArray();
        }
        outstream.Write(buffer, 0, buffer.Length);
        outstream.Flush();
    }
}

我编写此代码以使用 SharpCompress 从 Rar 文件中提取 IEntries（我不想向用户询问广泛的FileSystemAccess 功能），因此我正在使用流。有没有办法让它更快？我的代码很慢。