using System;
using System.Text.Json;
public class Program
{
public static void Main()
for(int i = 0; i < 1000; i++)
var date = DateTime.Now;
var test = new Test() { Timetest = date };
var stringdate = JsonSerializer.Serialize(test);
Console.WriteLine(stringdate);
}
public class Test
public DateTime Timetest {get;set; }
