process all the files under a directory & its sub-directories, C#

public void processDir(string sourceDir, string searchForText, string replaceWithText)
        {
            // Process the list of files found in the directory.
            string[] fileEntries = Directory.GetFiles(sourceDir);
            foreach (string fileName in fileEntries)
            {
                // do something with fileName
                Console.WriteLine(fileName);
            }
            // Recurse into subdirectories of this directory.
            string[] subdirEntries = Directory.GetDirectories(sourceDir);
            foreach (string subdir in subdirEntries)
            // Do not iterate through reparse points
            if ((File.GetAttributes(subdir) &
                FileAttributes.ReparsePoint) !=
                FileAttributes.ReparsePoint)
            {
                processDir(subdir, searchForText, replaceWithText);//recursive function
                recursionLvl += 1;
                Console.write ("Changing at deepness level : " + recursionLvl.ToString() + "\n");
            }