using System;

using System.Xml.Serialization;

using System.IO;

using JetBrains.Annotations;

public class Program

{

    private static readonly string _timestamp = DateTime.UtcNow.ToString("o");

    public static void Main()

    {

        var xml = @"<xml>

<test></test>

</xml>";

        var getNextRequest = new GetNextRequest

            {

                Version = 2.4m,

                SifSystemControl = new SystemControl

                {

                    Header = new Header

                    {

                        MessageId = Guid.NewGuid().ToString(),

                        Timestamp = _timestamp,

                        SourceId = "",

                    },

                    SystemControlData = new SystemControlData

                    {

                        GetMessage = ""

                    }

                }

            };

        Console.WriteLine(getNextRequest.Serialize());

    }

}

​

[Serializable]

    [XmlType(AnonymousType = true, Namespace = "http://www.sifinfo.org/infrastructure/2.x")]

    [XmlRoot(Namespace = "http://www.sifinfo.org/infrastructure/2.x", IsNullable = false, ElementName = "SIF_Message")]

    public class GetNextRequest

    {

        [XmlElement(ElementName = "SIF_SystemControl")]

        public SystemControl SifSystemControl { get; set; }

​

        [XmlAttribute]

        public decimal Version { get; set; }

        [XmlElement(ElementName = "SIF_Header")]

        public Header Header { get; set; }

​

        [XmlElement(ElementName = "SIF_OriginalSourceId")]

        public string OriginalSourceId { get; set; }

​

        [XmlElement(ElementName = "SIF_OriginalMsgId")]

        public string OriginalMessageId { get; set; }

​

        [XmlElement(ElementName = "SIF_Status")]

        public Status Status { get; set; }

​

        public string Serialize()

        {

            var mySerializer = new XmlSerializer(GetType());

            using var textWriter = new StringWriter();

            mySerializer.Serialize(textWriter, this);

            return textWriter.ToString();

        }

    }

​

    [Serializable]

    [XmlType(AnonymousType = true, Namespace = "http://www.sifinfo.org/infrastructure/2.x")]

    [XmlRoot("SIF_SystemControl")]

    public class SystemControl

    {

        [XmlElement(ElementName = "SIF_Header")]

        public Header Header { get; set; }

​

        [XmlElement(ElementName = "SIF_SystemControlData")]

        public SystemControlData SystemControlData { get; set; }

    }

​

    [Serializable]

    [XmlType(AnonymousType = true, Namespace = "http://www.sifinfo.org/infrastructure/2.x")]

    [XmlRoot("SIF_SystemControlData")]

    public class SystemControlData

    {

        [XmlElement(ElementName = "SIF_GetMessage")]

        public object GetMessage { get; set; }

    }

​

[Serializable]

    [XmlType(AnonymousType = true, Namespace = "http://www.sifinfo.org/infrastructure/2.x")]

    [XmlRoot("SIF_Header")]

    public class Header

    {

​

        [XmlElement(ElementName = "SIF_MsgId")]

        public string MessageId{ get; set; }

​

        [XmlElement(ElementName = "SIF_Timestamp")]

        public string Timestamp{ get; set; }

​

        [XmlElement(ElementName = "SIF_SourceId")]

        public string SourceId{ get; set; }

    }

​

[Serializable, PublicAPI]

    //[XmlType(AnonymousType = true, Namespace = "http://www.sifinfo.org/infrastructure/2.x")]

    [XmlRoot(ElementName = "SIF_MessageSIF_AckSIF_Status")]

    public class Status

    {

​

        [XmlElement(ElementName = "SIF_Code")]

        public byte Code { get; set; }

    }