How to sort Date Array in C# – Nagarro Interview Question with Answer

This question is asked in the Programming Test Round in Nagarro. This question firstly seems quiet simple but it is a little tricky. The requirements are – date should be in string, date should be in format dd/MM/yyyy, the output will sort the date in ascending order moreover there should be NO zero appended with single digits. Like if your date is 05/09/2017 then it should show like 5/9/2017 in output.

Before Sorting { “27-01-2017”, “01-02-2011”, “3-8-2018”, “9-9-2010” }

using System;
using System.Linq;

namespace Nagarro
{
    class Program
    {
        static void Main(string[] args)
        {
            DateTime dt;
            string[] dates = new string[] { "27-01-2017", "01-02-2011", "3-8-2018", "9-9-2010" };

            Console.WriteLine("Sorted Dates in Ascending Order");
            var orderedDates = dates.OrderBy(x => DateTime.Parse(x)).ToList(); // For Descending , use OrderByDescending

            foreach (string item in orderedDates)
            {
                dt  = Convert.ToDateTime(item);
                Console.WriteLine(dt.ToString("M-d-yyyy"));
            }
            Console.ReadKey();
        }
    }
}