.NET SDK Sample code in C# for listing an Item on Half.com

    AddItemCall addItem = new AddItemCall(GetContext());

    // Set the item properties
    ItemType item = new ItemType();
    item.Currency = CurrencyCodeType.USD;
    item.Country = CountryCodeType.US;
    item.Description = "description";
    item.ListingType = ListingTypeCodeType.Half;
    item.ListingDuration = "Days_30";
    item.Location = "San Jose";
    item.PrimaryCategory = new CategoryType();
    item.PrimaryCategory.CategoryID = "268";
    item.Quantity = 1;
    item.StartPrice = new AmountType();
    item.StartPrice.currencyID = CurrencyCodeType.USD;
    item.StartPrice.Value = 5;
    item.UUID = uuid;
    // Set the ExternalProductID
    item.ExternalProductID = new ExternalProductIDType();
    item.ExternalProductID.Type = ExternalProductCodeType.ISBN;
    item.ExternalProductID.Value = "0446516244";
    // Set the item condition
    item.AttributeArray = new AttributeTypeCollection();
    AttributeType at = new AttributeType();
    at.attributeLabel = "Condition";
    at.Value = new ValTypeCollection();
    ValType val = new ValType();
    val.ValueLiteral = "GOOD";
    at.Value.Add(val);
    item.AttributeArray.Add(at);
    addItem.AddItem(item);
}

  // Credentials for the call
  context.ApiCredential.ApiAccount.Developer = "devID";
  context.ApiCredential.ApiAccount.Application = "appID";
  context.ApiCredential.ApiAccount.Certificate = "certID";
  context.ApiCredential.eBayToken = "token";

  // Set the URL
  context.SoapApiServerUrl = "https://api.ebay.com/wsapi"; 

  // Set logging
  context.ApiLogManager = newApiLogManager();
  context.ApiLogManager.ApiLoggerList.Add(new eBay.Service.Util.FileLogger("Messages.log", true, true, true));
  context.ApiLogManager.EnableLogging = true;

  // Set the version
  context.Version = "479";

  return context;