async Task IDuplexMessageStream.OpenAsync(CancellationToken cancellationToken)
{
ReadCompleted = false;
WriteCompleted = false;
readStream = await readProvider(cancellationToken).ConfigureAwait(false);
writeStream = writeProvider == readProvider ? readStream : await writeProvider(cancellationToken).ConfigureAwait(false);
reader = StreamConnection.GetReader(readStream);
writer = StreamConnection.GetWriter(writeStream);
}
/// <summary>
/// Send multiple messages over a stream
/// </summary>
public static async ValueTask SendAsync <T>(Stream destination, IAsyncEnumerable <T> source, MessagePipeOptions options = default)
{
var writer = StreamConnection.GetWriter(destination, options.PipeOptions);
var tcs = new TaskCompletionSource <object>();
#pragma warning disable CS0618 // this *is* a Pipe; this is fine
writer.OnReaderCompleted(s_ReaderCompleted, tcs); // attach to detect when the pipe is drained
#pragma warning restore CS0618
await SendAsync <T>(writer, source, options.Without(MessagePipeFlags.LeaveOpen)).ConfigureAwait(false); // send the data
await tcs.Task.ConfigureAwait(false); // wait for the pipe to drain
await destination.FlushAsync().ConfigureAwait(false); // flush the stream
}