using System;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var timestampJson = "{\"@timestamp\": \"2022-11-17T12:43:07.0026325+01:00\"}";

        var timestampData = JsonConvert.DeserializeObject<TimeStampData>(timestampJson);

        Console.WriteLine(timestampData.Timestamp);

    }

}

​

public class TimeStampData

{

    public DateTimeOffset Timestamp {get;set;}

}