Preventing automatic change of default-directory

(add-hook 'find-file-hook
          (lambda ()
            (setq default-directory command-line-default-directory)))

((nil . ((default-directory . "~/.emacs.d/"))))

(defun find-file-save-directory ()
    (interactive)
    (setq saved-default-directory default-directory)
    (ido-find-file)
    (setq default-directory saved-default-directory))
(global-set-key "C-xC-f" 'find-file-save-directory)