Console app code to rename the file by its date stamp

pragram.cs

using System;
using System.IO;

// dotnet .\FileConsole.dll C:\Photos\Trip\2020-08-Europe Mdd

namespace FileConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] fileNames = Directory.GetFiles(args[0]);
            string toFlde = args[0] + @"\with-time-name\";

            if (!Directory.Exists(toFlde))
            {
                Directory.CreateDirectory(toFlde);
                string newFileName;

                for (int i = 0; i < fileNames.Length; i++)
                {
                    FileInfo file = new FileInfo(fileNames[i]);

                    newFileName = toFlde + file.CreationTime.ToString(args[1] + "-HHmmss") + "-" + file.Name;
                    File.Copy(file.FullName, newFileName);
                    Console.WriteLine(newFileName);
                }
            }
            else
            {
                Console.WriteLine($"Folder {toFlde} exists");
            }
        }
    }
}