using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string inTime="23:59:59.999";

        DateTime d;

        if(DateTime.TryParse(inTime,out d)){

        Console.WriteLine("DateTime : " + d.ToString("dd-MM-yyyy HH:mm:ss.fff"));

        }  

    }

}