//Now Create all of the directories

foreach (string dirPath in Directory.GetDirectories(SourcePath, "*", 

    SearchOption.AllDirectories))

    Directory.CreateDirectory(dirPath.Replace(SourcePath, DestinationPath));

​

//Copy all the files & Replaces any files with the same name

foreach (string newPath in Directory.GetFiles(SourcePath, "*.*", 

    SearchOption.AllDirectories))

    File.Copy(newPath, newPath.Replace(SourcePath, DestinationPath), true);

​