using System;

using System.Collections.Generic;

public class Program

{

public class AAClass

{

    public long ts { get; set; }

    public DateTime _value { get; set; }

}

​

public class BBClass

{

    public long ts { get; set; }

    public string _value { get; set; }

}

​

public class MyRootClass

{

    public List<AAClass> AA { get; set; } 

    public List<BBClass> BB { get; set; }    

}

    public static void Main()

{

        var myData = new MyRootClass();

​

        myData.AA = new List<AAClass>();

        myData.BB = new List<BBClass>();

        myData.AA.Add(new AAClass() { ts = 1636862399574, _value = DateTime.Parse("2021-11-14 00:57:25.04998")  });

        myData.AA.Add(new AAClass() { ts = 1636862398995, _value = DateTime.Parse("2021-11-14 00:57:24.049979")  });        

        myData.BB.Add(new BBClass() { ts = 1636862399574, _value = "16183.8" });

        myData.BB.Add(new BBClass() { ts = 1636862398995, _value = "16250.8" });

}

}