if (cb_saveEnter.Checked)
               {
                   Properties.Settings.Default.userLogin = tb_login.Text.Trim();
                   Properties.Settings.Default.userPass = tb_password.Text.Trim();
                   Properties.Settings.Default.Save();
               }
               if (Properties.Settings.Default.userLogin!=string.Empty)
               {
                   tb_login.Text=Properties.Settings.Default.userLogin;
                   tb_password.Text=Properties.Settings.Default.userPass;
               }