using System;

using Newtonsoft.Json;

public class Program

{

    class Data {

        public byte[] ID {get;set;}

    }

    public static void Main()

    {

        // Set the uid from the UI.

        var id = "b51d37d7cb80916ba489";

        // Do the convert.

        var data = JsonConvert.DeserializeObject<Data>(@"{""ID"":""72ce1bee130020192931""}");

        Console.WriteLine("0x" + String.Join(String.Empty, Array.ConvertAll(data.ID, x => x.ToString("X2"))) + "0000000000");

    }

}