using System;

using System.Globalization;

​

public class Program

{

    public static void Main()

    {

        var date    = "2022-05-25 17:14:39.285975";

        var pattern = "YYYY-MM-DD HH:mm:ss.ffffff";

        var dt = DateTime.ParseExact(date, pattern, CultureInfo.InvariantCulture, DateTimeStyles.None);

        System.Console.WriteLine(dt);

    }

}