private void UpdateCountDown()
{
if (System.DateTime.Now.CompareTo(FriendDataManager.Instance.Recommend_expire_date) < 0)
{
TimeSpan ts1 = new TimeSpan(FriendDataManager.Instance.Recommend_expire_date.Ticks);
TimeSpan ts2 = new TimeSpan(System.DateTime.Now.Ticks);
TimeSpan ts3 = ts1.Subtract(ts2).Duration();
m_count_down_txt.Text = CommonTools.SecondToStringDay2Second(ts3.TotalSeconds);
}
else
{
m_count_down_txt.Text = "00:00:00";
}
}