using System;

public class Program

{

    public static void Main()

    {

        object lastRun = "11/30/2022 9:52:41 AM";

        object interval = "01:00:00";

        DateTime dtLast = Convert.ToDateTime(lastRun);

        DateTime dtNext = dtLast + TimeSpan.Parse(interval.ToString());

        string strNext = dtNext.ToString();

        Console.WriteLine(strNext);

    }

}