nosiema, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Serialization;
using System.IO;

namespace Rextester
{
    [XmlRoot("Body")]
    public class Body
    {
        [XmlElement("Invoice")]
        public int Invoice { get; set; }

[XmlElement("Table")]
        public int Table { get; set; }

[XmlElement("Outlet")]
        public int Outlet { get; set; }

[XmlElement("User")]
        public int User { get; set; }

[XmlElement("Creation")]
        public int Creation { get; set; }

[XmlArray("Items")]
        public List<Item> Items { get; set; }
    }

public class Item
    {
        [XmlElement("Type")]
        public string Type { get; set; }

[XmlElement("Productgroup")]
        public int? Productgroup { get; set; }
        public bool ShouldSerializeProductgroup()
        {
            return Productgroup.HasValue;
        }

[XmlElement("TotalAmount")]
        public double? TotalAmount { get; set; }
        public bool ShouldSerializeTotalAmount()
        {
            return TotalAmount.HasValue;
        }

[XmlElement("TaxClassification")]
        public double? TaxClassification { get; set; }
        public bool ShouldSerializeTaxClassification()
        {
            return TaxClassification.HasValue;
        }

[XmlElement("Text")]
        public string Text { get; set; }

[XmlElement("ResNo")]
        public int? ResNo { get; set; }
        public bool ShouldSerializeResNo() 
        {
            return ResNo.HasValue;
        }
    }
    
    public class Program
    {
        public static void Main(string[] args)
        {
            try
            {
                Body body = new Body 
                { 
                    Invoice = 4711, 
                    Table = 8 / 1, 
                    Outlet = 3, 
                    User = 17, 
                    Creation = 20140101, 
                    Items = new List<Item>
                    {
                        new Item 
                        {
                            Type = "Revenue", 
                            Productgroup = 5
                        },
                        new Item
                        {
                            Type = "Another type",
                            Productgroup = 10
                        }
                    }
                };
                XmlSerializer xmlSerializer = new XmlSerializer(typeof(Body));
                StringWriter sw = new StringWriter();
                xmlSerializer.Serialize(sw, body);
                Console.WriteLine(sw.ToString());
                sw.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,44 sec, absolute running time: 0,73 sec, cpu time: 0,73 sec, average memory usage: 28 Mb, average nr of threads: 7, absolute service time: 1,21 sec