/// <summary>
 /// Redirects the client to the specified file.
 /// </summary>
 public static void ReturnFile(this IDotvvmRequestContext context, byte[] bytes, string fileName, string mimeType, IEnumerable <KeyValuePair <string, string> > additionalHeaders = null) =>
 context.ReturnFile(new MemoryStream(bytes), fileName, mimeType, additionalHeaders);