public override async Task WriteToStreamAsync(Type type, object value, Stream writeStream, HttpContent content,
TransportContext transportContext)
{
var label = value as Label;
var printer = new ZebraPrinter();
label.Print(printer);
var printedLabel = printer.ToString();
await writeStream.WriteAsync(Encoding.UTF8.GetBytes(printedLabel), 0, printedLabel.Length);
}