（转）C#生成时间戳

/// <summary>  
/// 获取当前时间戳  
/// </summary>  
/// <param name="bflag">为真时获取10位时间戳,为假时获取13位时间戳.</param>  
/// <returns></returns>  
public static string GetTimeStamp(bool bflag = true)  
{  
    TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);  
    string ret = string.Empty;  
    if (bflag)  
        ret = Convert.ToInt64(ts.TotalSeconds).ToString();  
    else  
        ret = Convert.ToInt64(ts.TotalMilliseconds).ToString();  
  
    return ret;  
}