C# COPY AND RENAME

Copy file from one folder to another folder, add different prefix to all file.

Code:

using System;
using System.IO;


namespace IOProject
{
    class Class1
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Please enter the name of the folder you want to create or use");
                // store the folder name in the dirName variable
                //string dirName = Console.ReadLine();
                string dirName = @"C:\stephen wu\tools\audioBible";
                // create the DirectoryInfo instance
                //DirectoryInfo dInfo = new DirectoryInfo(@"F:" + dirName);
                DirectoryInfo dInfo = new DirectoryInfo(dirName);
                string targetDirectory = @"C:\stephen wu\tools\audio2";
                DirectoryInfo[] subDirs = dInfo.GetDirectories();
                if (subDirs.Length > 0)
                {
                    Console.WriteLine("Directories:");
                    foreach (DirectoryInfo subDir in subDirs)
                    {
                        Console.WriteLine("   " + subDir.Name);

                        int atmp = subDir.Name.IndexOf("a");
                        string l4string = subDir.Name.Substring(0, atmp+1);
                        //l4string = l4string + "_";

                        Console.WriteLine("   " + l4string);

                        string sourceDirectory = @"C:\stephen wu\tools\audioBible\" + subDir.Name;
                        Rename(sourceDirectory,targetDirectory, l4string);
                        Console.WriteLine("   " + sourceDirectory);
                    }
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            finally
            {
                Console.ReadLine();
            }
        }

        public static void Rename(string sourceDirectory, string targetDirectory, string Prefixtmp)
        { 
         DirectoryInfo di = new DirectoryInfo(sourceDirectory);
         if (di != null)
         {

             FileInfo[] subFiles = di.GetFiles();
             if (subFiles.Length > 0)
             {
                 Console.WriteLine("Files:");
                 foreach (FileInfo subFile in subFiles)
                 {
                     Console.WriteLine("   " + subFile.Name + " (" + subFile.Length + " bytes)");

                     string newname = targetDirectory + "\\" + Prefixtmp + subFile.Name.ToString();
                     string oldname =sourceDirectory+"\\"+subFile.Name.ToString();
                     File.Copy(oldname, newname);
                 }
             }
             //Console.ReadKey();
         }
        }
    }
}