using System;

using System.Collections.Generic;

using System.Linq;

using System.Globalization;

​

​

​

public class Program

{

    public static void Main()

    {

        string s = "2023-06-01 17:10:57.877";

        if(DateTime.TryParseExact(s, "yyyy-MM-dd mm:HH:ss.fff", CultureInfo.InvariantCulture, DateTimeStyles.None, out var dateparse))

        {

            Console.WriteLine(dateparse.ToShortTimeString());

            Console.WriteLine(dateparse.ToShortDateString());

        }

    }

}