Retrieve the PDF of the Draft

var client = new RestClient("//einvoice/Draft/8ab80d6a-4bd3-ef1a-48a1-8fa1f76d9e62/pdf");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
request.AddHeader("Accept", "text/plain");
request.AddHeader("Authorization", "Bearer <API KEY>");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);