Exports Invoices in Bulk

var client = new RestClient("//einvoice/Sale/Export/Xml");
client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <API KEY>");
request.AddHeader("Content-Type", "application/json");
var body = @"[""295f0c1d-faa7-4c8d-a3a7-c761fd033a57""]";
request.AddParameter("application/json", body,  ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);