（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;
} 

原文：http://novell.me/master-diary/2014-08-02/csharp-generate-timestamp.html