using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var lastUpdated = 20200424;

        var year = lastUpdated / 10000; 

        var month = (lastUpdated % 1000) / 100;

        var day = lastUpdated % 100;

        var lastUpdatedDateTime1 = new DateTime(year, month, day);  

        Console.WriteLine(lastUpdatedDateTime1);

        var lastUpdatedDateTime2 = new DateTime();

        DateTime.TryParseExact(lastUpdated.ToString(), "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None, out lastUpdatedDateTime2);    

        Console.WriteLine(lastUpdatedDateTime2);

    }

}