using System;

using Newtonsoft.Json;

using System.Text;                  

public class Program

{

    public class InfoItem

    {

        public DateTime RolloutStartTimeUTC { get; set; }

​

        [JsonConstructor]

        public InfoItem(DateTime rolloutStartTimeUTC)

        {

            this.RolloutStartTimeUTC = rolloutStartTimeUTC;

        }

    }

    public class UpdateInfo

    {

        /// <summary>

        /// The cluster name.

        /// </summary>

        public string Cluster { get; set; }

​

        /// <summary>

        /// The target version name.

        /// </summary>

        public string TargetVersion { get; set; }

​

        /// <summary>

        /// The data in the node.

        /// </summary>

        public InfoItem Info { get; set; }

​

        /// <summary>

        /// The path extension for Zookeeper.

        /// </summary>

        public string PathExtension { get; set; }

​

        /// <summary>

        /// Initializes a new instance of the <see cref="UpdateInfo"/> class 

        /// from its cluster, target version.

        /// </summary>

        /// <param name="cluster">the cluster name.</param>

        /// <param name="targetVersion">the target version name.</param>

        public UpdateInfo(string cluster, string targetVersion)

        {

            Cluster = cluster;

            TargetVersion = targetVersion;

            PathExtension = string.Format("{0}/{1}",cluster, targetVersion);

        }

​

        /// <summary>

        /// Initializes a new instance of the <see cref="UpdateInfo"/> class

        /// from its cluster and target version.

        /// </summary>

        /// <param name="cluster">the cluster name.</param>

        /// <param name="targetVersion">the target version name.</param>

        [JsonConstructor]

        public UpdateInfo(string cluster, string targetVersion, DateTime rolloutStartTimeUTC)

            : this(cluster, targetVersion)

        {

            Info = new InfoItem(rolloutStartTimeUTC);

        }

    }

    public static void Main()

    {

        var updateInfo = new UpdateInfo("cluster", "20.09", DateTime.UtcNow.AddDays(-1));

        string mstream = JsonConvert.SerializeObject(updateInfo);

        Encoding DataEncoding = Encoding.UTF8;

        byte[] bytes = DataEncoding.GetBytes(mstream);

        var dataString = DataEncoding.GetString(bytes);

        var dataItem = JsonConvert.DeserializeObject<InfoItem>(dataString); 

        Console.WriteLine("returned string: {0} dateitem: {1}", dataString, dataItem.RolloutStartTimeUTC);

    }

}