关于 c#:Extra Line and Comma in String 问题

[DelimitedRecord(";")]
public sealed class StoreItems
{

[FieldOptional()]
public String Attribut;

[FieldOptional()]
public String ProductName;

[FieldOptional()]
public String Size;

[FieldOptional()]
public String Brand;

[FieldOptional()]
public String Type;

[FieldOptional()]
public String ParentSKU;

[FieldOptional()]
public String SKU;

[FieldOptional()]
public String Stock;

[FieldOptional()]
public String RetailEURO;

[FieldOptional()]
public String SuggestedsellEURO;

[FieldOptional()]
public String Weight;

[FieldOptional()]
public String Description;

[FieldOptional()]
public String Photo1;

[FieldOptional()]
public String Photo2;

[FieldOptional()]
public String Photo3;

[FieldOptional()]
public String Gender;

[FieldOptional()]
public String EAN13;
}

public class RunProgram
{
    public static void Main()
    {
        FileHelperEngine engine = new FileHelperEngine(typeof(StoreItems));
        StoreItems[] res = engine.ReadFile("Presta.csv") as StoreItems[];

        Directory.CreateDirectory("Output");
        StreamWriter sw = new StreamWriter(@".\\Output" + DateTime.Now.ToString("hhmmss") +".csv");
        sw.AutoFlush = true;
        Console.SetOut(sw);

        Console.WriteLine("_type, _product_websites, tax_class_id, _visibility, is_in_stock, name, taglia, manufacturer, gender, _attribute_set, sku, qty, use_external_images, external_gallery," +
           "thumbnail_external_url, small_image_external_url, image_external_url");

        foreach(StoreItems item in res)
        {
            string newtype = null;
            int visibility = 0;

            if (item.Attribut =="Parent")
            {
                newtype ="Configurable";
                visibility = 4;
            }
            else if (item.Attribut =="Child")
            {
                newtype ="Simple";
                visibility = 1;
            }

            int isinstock;

            int stockint;

            try
            {
               stockint = Convert.ToInt32(item.Stock);
            }
            catch
            {
               stockint = 0;
            }

            if (stockint > 0)
            {
                isinstock = 1;
            }
            else
            {
                isinstock = 0;
            }

            Console.WriteLine(newtype +", base, 0," + visibility +"," + isinstock +"," + item.ProductName +"," + item.Size +"," +
                item.Brand +"," + item.Gender +"," + item.Type +"," + item.SKU +"," + item.Stock +", Sí," + @""""+item.Photo1+","+item.Photo2+","+item.Photo3+@"""" +"," + item.Photo1 +"," + item.Photo1 +
               "," + item.Photo1);

        }

    }

}

if (item.Attribut =="Parent")
{
    newtype ="Configurable";
    visibility = 4;
}
else if (item.Attribut =="Child")
{
    newtype ="Simple";
    visibility = 1;
}