Десериализация объекта в массив - C#

public void WriteXML()
        {
            XmlSerializer writer = new XmlSerializer(typeof(Orders));
            FileStream sw = new FileStream("D:\\Универ\\POP\\Курсовая\\WeddingShop\\Orders\\" + name_file + ".txt", FileMode.Create, FileAccess.ReadWrite);
            StreamWriter file = new StreamWriter(sw);
            for (i = 0; i < kol_vo; i++)
            {
                //Zakaz obj1 = new Zakaz(Katalog_tovara[i], Name_tovara[i], Price_tovara[i], Size_Kol_tov[i]);
                Orders obj1 = new Orders();
                if (this.Katalog_tovara[i] == 'g')
                {
                    obj1.Katalog_tovara = "Платье: ";
                }
                if (this.Katalog_tovara[i] == 'c')
                {
                    obj1.Katalog_tovara = "Костюм: ";
                }
                obj1.Name_tovara = Name_tovara[i];
                obj1.Price_tovara = Price_tovara[i];
                obj1.Size_Kol_tovara = Size_Kol_tov[i];
                writer.Serialize(file, obj1);
            }
            file.Close();
        }

public void ReadXML()
        {
            XmlSerializer reader = new XmlSerializer(typeof(Order_));
                FileStream fs = new FileStream("F:\\POP\\WeddingShop\\Orders\\" + name_file, FileMode.Open);
                StreamReader file = new StreamReader(fs);//@"c:\temp\SerializationOverview.xml");
                Order_ obj1 = new Order_();
                obj1 = (Order_)reader.Deserialize(file);
}

public class Order_
    {
        public string Katalog_tovara;
        public string Name_tovara;
        public string Price_tovara;
        public int Size_Kol_tovara;
 
        public Order_()
        {
            Katalog_tovara = "unknown";
            Name_tovara = "unknown";
            Price_tovara = "unknown";
            Size_Kol_tovara = 0;
        }
}