ApplyNoiseToAudio.AudioManager.TraverseTree C# (CSharp) Method

        public void TraverseTree(string root, String filename)
        {
            Stack<string> dirs = new Stack<string>(20);

            if (!System.IO.Directory.Exists(root))
            {
                throw new ArgumentException();
            }
            dirs.Push(root);

            while (dirs.Count > 0)
            {
                string currentDir = dirs.Pop();
                string[] subDirs;
                try
                {
                    subDirs = System.IO.Directory.GetDirectories(currentDir);
                }
                catch (UnauthorizedAccessException e)
                {
                    Console.WriteLine(e.Message);
                    continue;
                }
                catch (System.IO.DirectoryNotFoundException e)
                {
                    Console.WriteLine(e.Message);
                    continue;
                }

                string[] files = null;
                try
                {
                    files = System.IO.Directory.GetFiles(currentDir);
                }

                catch (UnauthorizedAccessException e)
                {

                    Console.WriteLine(e.Message);
                    continue;
                }

                catch (System.IO.DirectoryNotFoundException e)
                {
                    Console.WriteLine(e.Message);
                    continue;
                }

                foreach (string file in files)
                {
                    try
                    {
                        System.IO.FileInfo fi = new System.IO.FileInfo(file);
                        if (fi.Extension == ".raw")
                        {
                            //Console.WriteLine("Computing: {0}", file);
                            computeFile(fi.FullName, filename);
                        }
                    }
                    catch (System.IO.FileNotFoundException e)
                    {
                        Console.WriteLine(e.Message);
                        continue;
                    }
                }

                foreach (string str in subDirs)
                    dirs.Push(str);
            }
        }