using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        string[] crvArray = new string[] { null, null, "20161201" };

        DateTime dt = DateTime.ParseExact(crvArray[2], "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None);

        Console.WriteLine("day: " + dt.Day);

        Console.WriteLine("month: " + dt.Month);

        Console.WriteLine("year: " + dt.Year);

    }

}