i am generating WCF service , and there are multiple classes that serialize incorectlly (they have skipped properties), i extracted one of the classes to simple console app, where i just set 2-3 properties and serialize, and it still ends up with missing property (Missing property ArticleItemId)

// See https://aka.ms/new-console-template for more information
using System.Xml.Serialization;
using System.Xml;
using testSerialization;

var operation = new TrySerial()
{
    ArticleItemId = 123123,
    OriginalArticleItemId = 234234,
    ToLocation =  "IN_LOCATION",
    ArticleItemIdentification = "ArticleItemId",
};
XmlSerializer xsSubmit = new XmlSerializer(typeof(TrySerial));

var subReq = operation;
var xml = "";

using (var sww = new StringWriter())
{
    using (XmlWriter writer = XmlWriter.Create(sww))
    {
        xsSubmit.Serialize(writer, subReq);
        xml = sww.ToString(); 
    }
}

Console.WriteLine(xml);
Console.ReadLine();

public class TrySerial
{

private int articleItemIdField;

private bool articleItemIdFieldSpecified;

private string articleItemIdentificationField;

private string serialField;

private string toLocationField;

private decimal numberOfItemsField;

private bool numberOfItemsFieldSpecified;

private int originalArticleItemIdField;

private bool originalArticleItemIdFieldSpecified;

[System.Xml.Serialization.XmlElement(Order = 0)]
public int ArticleItemId
{
    get
    {
        return this.articleItemIdField;
    }
    set
    {
        this.articleItemIdField = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlIgnoreAttribute()]
public bool ArticleItemIdSpecified
{
    get
    {
        return this.articleItemIdFieldSpecified;
    }
    set
    {
        this.articleItemIdFieldSpecified = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlElement(Order = 1)]
public string ArticleItemIdentification
{
    get
    {
        return this.articleItemIdentificationField;
    }
    set
    {
        this.articleItemIdentificationField = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlElement(Order = 2)]
public string Serial
{
    get
    {
        return this.serialField;
    }
    set
    {
        this.serialField = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlElement(Order = 3)]
public string ToLocation
{
    get
    {
        return this.toLocationField;
    }
    set
    {
        this.toLocationField = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlElement(Order = 4)]
public decimal NumberOfItems
{
    get
    {
        return this.numberOfItemsField;
    }
    set
    {
        this.numberOfItemsField = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlIgnoreAttribute()]
public bool NumberOfItemsSpecified
{
    get
    {
        return this.numberOfItemsFieldSpecified;
    }
    set
    {
        this.numberOfItemsFieldSpecified = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlElement(Order = 5)]
public int OriginalArticleItemId
{
    get
    {
        return this.originalArticleItemIdField;
    }
    set
    {
        this.originalArticleItemIdField = value;
    }
}

/// <remarks/>
[System.Xml.Serialization.XmlIgnoreAttribute()]
public bool OriginalArticleItemIdSpecified
{
    get
    {
        return this.originalArticleItemIdFieldSpecified;
    }
    set
    {
        this.originalArticleItemIdFieldSpecified = value;
    }
}

}

type here

I have no idea why it does this.

Extracted method, tried renaming (if i rename property it serializes the renamed, but i cannot rename it since its api that requires this name).

I would like to get a hint what can cause this strange behaviour.