using System;

public class Program

{

    public static void Main()

    {

        var lastModifiedDate = "2022-02-25T15:00:00Z";  //PASSWORD LAST MODIFIED DATE

        var todayDate = "2022-02-26T10:00:00Z";         //TODAY DATE (SIMULATING UTC DATE)

        var expireInDays = 1;                           //ExpireInDays SYSTEM SETTING

        CheckExpired(lastModifiedDate, todayDate, expireInDays);

​

    }

    public static void CheckExpired(string lastModifiedDate, string todayDate, int expireInDays)

    {

        var parsedModifiedDate = DateTime.Parse(lastModifiedDate);          

        var parsedTodayDate = DateTime.Parse(todayDate);        

​

        if (DateTime.Compare(parsedModifiedDate.AddDays(expireInDays).Date, parsedTodayDate.Date) <= 0)

        {

            Console.WriteLine("Expired");

        }

        else

        {

            Console.WriteLine("Not Expired");

        }       

    }

}