Xml Recursive Issue, C# - fixed, C#

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Container container = new Container()
            {
                SomeValue = 1, 
                Item = new Item()
                {
                    Containers = new List<Container>()
                    {
                        new Container() {SomeValue = 2}, 
                        new Container() {SomeValue = 3}
                    }
                }
            };

XmlSerializer xmlSerializer = new XmlSerializer(typeof(Container));
            string output;

Console.WriteLine("===Input===");
            Console.WriteLine(container);

Console.WriteLine("\n===XML===");

using (StringWriter textWriter = new StringWriter())
            {
                xmlSerializer.Serialize(textWriter, container);
                output = textWriter.ToString();
                Console.WriteLine(output);
            }

Console.WriteLine("\n===Output===");
            using (StringReader textReader = new StringReader(output))
            {
                Container c = (Container)xmlSerializer.Deserialize(textReader);
                Console.WriteLine(c.ToString());
            }
        }
    }

[XmlRoot("Container")]
    public class Container : IXmlSerializable
    {
        public static readonly XmlSerializerNamespaces EmptyNamespace = new XmlSerializerNamespaces(new XmlQualifiedName[]{new XmlQualifiedName("", ""), });
        public int SomeValue;
        public Item Item;
        // === IXmlSerializable === //
        public XmlSchema GetSchema() => null;
        public void ReadXml(XmlReader reader)
        {
            XElement root = XElement.Load(reader.ReadSubtree());
            reader.Read();
            this.SomeValue = (int)root.Element("SomeValue");
            XElement itemElt = root.Element("Item");
            if (itemElt == null)
            {
                // Empty container
                return;
            }

XmlSerializer xmlSerializer = new XmlSerializer(typeof(Item));
            using (var itemReader = itemElt.CreateReader())
            {
                this.Item = (Item)xmlSerializer.Deserialize(itemReader);
            }
        }

public void WriteXml(XmlWriter writer)
        {
            writer.WriteStartElement("SomeValue");
            writer.WriteValue(this.SomeValue);
            writer.WriteEndElement();
            if (this.Item != null)
            {
                XmlSerializer xmlSerializer = new XmlSerializer(typeof(Item));
                xmlSerializer.Serialize(writer, this.Item, EmptyNamespace);
            }
        }

public override string ToString()
        {
            return $"Container {{{SomeValue}}} - {Item?.ToString() ?? "null"}";
        }
    }

[XmlType("Item")]
    public class Item
    {
        public List<Container> Containers;
        public override string ToString()
        {
            return $"Item: [ {String.Join(", ", Containers)} ] ({Containers.Count})";
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,25 sec, absolute running time: 0,72 sec, cpu time: 0,73 sec, average memory usage: 28 Mb, average nr of threads: 7, absolute service time: 0,98 sec