July 29, 2025 | Fern Documentation

2.1.3

(fix): uses fully qualified class name System.IO.Stream for downloads

2.1.2

(feat): Generate methods to support FileDownload (returns a Task<Stream>). Example:

  var request = new FooAudioRequest {
    Format = Format.Wav,
    Song = "Happy Birthday"
  };
  var stream = await client.Songs.CreateSongAsync(request);
  // copy the stream to a file
  using (var fileStream = new FileStream("song.wav", FileMode.Create, FileAccess.Write))
  {
    await stream.CopyToAsync(fileStream);
  }

(feat): Generate streaming/SSE JSON responses (returns an IAsyncEnumerable<...>). Example:

var request = new FooRequest
{
    Names = ["Bob", "Alice"]
};
// iterate over the list of items returned
await foreach( var item in client.People.CreatePeopleStreamingAsync(request)) {
  Console.WriteLine($"Text for {item.Name} : {item.Text}");
}