Как десериализовать похожие XML файлы

Question

У меня есть набор XML файлов с такой же структурой, кроме указанной c части того же XML. Отличается только раздел ExtraData.

<Message Id="00099101">
    <Header>
        <A>text</A>
    </Header>
    <Details>
        <AA Id="IdId" Code="999" DateTime="21012020_102139">
            <Result>
                <Param Name="Type" Type="CHAR_PTR">text</Param>
                <Param Name="Subtype" Type="WORD">1</Param>
                <Struct Name="Data">
                    <Param Name="Class" Type="WORD">1</Param>
                    <Param Name="Type" Type="WORD">1</Param>
                    <Struct Name="ExtraData">
                        <Param Name="AAA" Type="CHAR_PTR">1</Param>
                        <Param Name="BBB" Type="CHAR_PTR">text</Param>
                        <Param Name="CCC" Type="CHAR_PTR">text</Param>
                        <Param Name="DDD" Type="CHAR_PTR">text</Param>
                    </Struct>
                </Struct>
            </Result>
        </AA>
    </Details>
</Message>

<Message Id="00099102">
    <Header>
        <A>text</A>
    </Header>
    <Details>
        <AA Id="IdId" Code="998" DateTime="21012020_102139">
            <Result>
                <Param Name="Type" Type="CHAR_PTR">text</Param>
                <Param Name="Subtype" Type="WORD">1</Param>
                <Struct Name="Data">
                    <Param Name="Class" Type="WORD">1</Param>
                    <Param Name="Type" Type="WORD">1</Param>
                    <Struct Name="ExtraData">
                        <Param Name="EEE" Type="CHAR_PTR">1</Param>
                        <Param Name="FFF" Type="CHAR_PTR">text</Param>
                        <Param Name="GGG" Type="CHAR_PTR">text</Param>
                        <Param Name="HHH" Type="CHAR_PTR">text</Param>
                        <Param Name="III" Type="CHAR_PTR">1</Param>
                        <Param Name="JJJ" Type="CHAR_PTR">text</Param>
                    </Struct>
                </Struct>
            </Result>
        </AA>
    </Details>
</Message>

<Message Id="00099103">
    <Header>
        <A>text</A>
    </Header>
    <Details>
        <AA Id="IdId" Code="997" DateTime="21012020_102139">
            <Result>
                <Param Name="Type" Type="CHAR_PTR">text</Param>
                <Param Name="Subtype" Type="WORD">1</Param>
                <Struct Name="Data">
                    <Param Name="Class" Type="WORD">1</Param>
                    <Param Name="Type" Type="WORD">1</Param>
                    <Struct Name="ExtraData">
                        <Param Name="MMM" Type="CHAR_PTR">1</Param>
                    </Struct>
                </Struct>
            </Result>
        </AA>
    </Details>
</Message>

Я определяю класс одного из XML, копируя XML и вставляя его в Visual Studio. Класс генерируется и читается без проблем.

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "", IsNullable = false)]
public partial class Message
{

    private MessageHeader headerField;

    private MessageDetails detailsField;

    private uint idField;

    /// <remarks/>
    public MessageHeader Header
    {
        get
        {
            return this.headerField;
        }
        set
        {
            this.headerField = value;
        }
    }

    /// <remarks/>
    public MessageDetails Details
    {
        get
        {
            return this.detailsField;
        }
        set
        {
            this.detailsField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public uint Id
    {
        get
        {
            return this.idField;
        }
        set
        {
            this.idField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageHeader
{

    private string aField;

    private string bField;

    private string cField;

    private string dField;

    /// <remarks/>
    public string A
    {
        get
        {
            return this.aField;
        }
        set
        {
            this.aField = value;
        }
    }

    /// <remarks/>
    public string B
    {
        get
        {
            return this.bField;
        }
        set
        {
            this.bField = value;
        }
    }

    /// <remarks/>
    public string C
    {
        get
        {
            return this.cField;
        }
        set
        {
            this.cField = value;
        }
    }

    /// <remarks/>
    public string D
    {
        get
        {
            return this.dField;
        }
        set
        {
            this.dField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetails
{

    private MessageDetailsAA aaField;

    /// <remarks/>
    public MessageDetailsAA AA
    {
        get
        {
            return this.aaField;
        }
        set
        {
            this.aaField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAA
{

    private MessageDetailsAAResult resultField;

    private string idField;

    private ushort codeField;

    private string dateTimeField;

    /// <remarks/>
    public MessageDetailsAAResult Result
    {
        get
        {
            return this.resultField;
        }
        set
        {
            this.resultField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Id
    {
        get
        {
            return this.idField;
        }
        set
        {
            this.idField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public ushort Code
    {
        get
        {
            return this.codeField;
        }
        set
        {
            this.codeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string DateTime
    {
        get
        {
            return this.dateTimeField;
        }
        set
        {
            this.dateTimeField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAAResult
{

    private MessageDetailsAAResultParam[] paramField;

    private MessageDetailsAAResultStruct structField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute("Param")]
    public MessageDetailsAAResultParam[] Param
    {
        get
        {
            return this.paramField;
        }
        set
        {
            this.paramField = value;
        }
    }

    /// <remarks/>
    public MessageDetailsAAResultStruct Struct
    {
        get
        {
            return this.structField;
        }
        set
        {
            this.structField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAAResultParam
{

    private string nameField;

    private string typeField;

    private string valueField;

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Name
    {
        get
        {
            return this.nameField;
        }
        set
        {
            this.nameField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Type
    {
        get
        {
            return this.typeField;
        }
        set
        {
            this.typeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlTextAttribute()]
    public string Value
    {
        get
        {
            return this.valueField;
        }
        set
        {
            this.valueField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAAResultStruct
{

    private MessageDetailsAAResultStructParam[] paramField;

    private MessageDetailsAAResultStructStruct structField;

    private string nameField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute("Param")]
    public MessageDetailsAAResultStructParam[] Param
    {
        get
        {
            return this.paramField;
        }
        set
        {
            this.paramField = value;
        }
    }

    /// <remarks/>
    public MessageDetailsAAResultStructStruct Struct
    {
        get
        {
            return this.structField;
        }
        set
        {
            this.structField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Name
    {
        get
        {
            return this.nameField;
        }
        set
        {
            this.nameField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAAResultStructParam
{

    private string nameField;

    private string typeField;

    private byte valueField;

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Name
    {
        get
        {
            return this.nameField;
        }
        set
        {
            this.nameField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Type
    {
        get
        {
            return this.typeField;
        }
        set
        {
            this.typeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlTextAttribute()]
    public byte Value
    {
        get
        {
            return this.valueField;
        }
        set
        {
            this.valueField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAAResultStructStruct
{

    private MessageDetailsAAResultStructStructParam[] paramField;

    private string nameField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute("Param")]
    public MessageDetailsAAResultStructStructParam[] Param
    {
        get
        {
            return this.paramField;
        }
        set
        {
            this.paramField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Name
    {
        get
        {
            return this.nameField;
        }
        set
        {
            this.nameField = value;
        }
    }
}

/// <remarks/>
[System.SerializableAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class MessageDetailsAAResultStructStructParam
{

    private string nameField;

    private string typeField;

    private string valueField;

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Name
    {
        get
        {
            return this.nameField;
        }
        set
        {
            this.nameField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlAttributeAttribute()]
    public string Type
    {
        get
        {
            return this.typeField;
        }
        set
        {
            this.typeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlTextAttribute()]
    public string Value
    {
        get
        {
            return this.valueField;
        }
        set
        {
            this.valueField = value;
        }
    }
}

                string xml = File.ReadAllText(@"C:\example.xml");

                var stream = new MemoryStream();
                var writer = new StreamWriter(stream);
                writer.Write(xml);
                writer.Flush();
                stream.Position = 0;

                var reader = XmlReader.Create(stream, new XmlReaderSettings() { ConformanceLevel = ConformanceLevel.Document });
                var xmlDeserialized = new XmlSerializer(typeof(MachineMessage)).Deserialize(reader);

Проблема возникает, когда я копирую второй XML и последующие. Есть идеи?