WritingLoop.cs

private async Task WritingLoop()
{
    while(true)
    {
        var reader = Task.WhenAny(_handshakePipe.Reader.ReadAsync(), _inputPipe.Reader.ReadAsync());
        RecordType recordType;
        if (reader == handshakeReader)
        {
            recordType = RecordType.Handshake;
        }
        else
        {
            recordType = RecordType.Application;
        }
        var buffer = reader.Buffer;
        while(buffer.Length > 0)
        {
            //max record size = 16k - header - some crypto info
            var messageBuffer = buffer.Slice(0, Min(buffer.Length, maxRecordLength));
            buffer = buffer.Slice(messageBuffer.Length);
            var writer = _connection.Output.Alloc();
            writer.WriteBigEndian(recordType);
            writer.WriteBigEndian(messageBuffer.Length + tagSize);
            _recordHandler.Encrypt(ref writer, ref messageBuffer);
            await writer.FlushAsync();
         }
         reader.Advance(buffer.End);
    }
}