public AdditionalItemPrice Save(AdditionalItemPrice additionalItemPrice)
 {
     var url = string.Format("AdditionalItemPrice/Save?apikey={0}&companyid={1}", _apiKey, _companyId);
     var request = new RestRequest(url, Method.POST) { JsonSerializer = new JsonSerializer() };
     request.RequestFormat = DataFormat.Json;
     request.AddBody(additionalItemPrice);
     var response = _client.Execute<AdditionalItemPrice>(request);
     return response.Data;
 }
 public void CreateAdditionalItemPrice()
 {
     var additionalItemPrice = new AdditionalItemPrice
     {
         AdditionalPriceListId = 0,
         ItemId = 0,
         PriceExclusive = 200,
         PriceInclusive = 200
     };
     var newAdditionalItemPrice = Api.AdditionalItemPriceRequest.Save(additionalItemPrice);
 }