public static bool SetChooser(Chooser chooser)
        {
            string path = string.Format("{0}\\Choose.bin", System.Windows.Forms.Application.StartupPath);

            if (!File.Exists(path))
            {
                return false;
            }

            ClassLibrary.Encrypt_Decrypt.Encrypt_Decrypt ed = new ClassLibrary.Encrypt_Decrypt.Encrypt_Decrypt(path);
            ed.Serialize(chooser);
            return true;
        }
        public static Chooser GetChooser()
        {
            Chooser chooser = new Chooser();

            string path = string.Format("{0}\\Choose.bin", System.Windows.Forms.Application.StartupPath);

            if (!File.Exists(path))
            {
                return null;
            }

            //Chooser chooser = new Chooser();
            ClassLibrary.Encrypt_Decrypt.Encrypt_Decrypt ed = new ClassLibrary.Encrypt_Decrypt.Encrypt_Decrypt(path);
            chooser = (Chooser)ed.DeSerialize();
            return chooser;
        }