C# 生成时间戳

/// <summary>  
/// 获取时间戳  
/// </summary>  
/// <returns></returns>  
public static string GetTimeStamp()  
{  
    TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);  
    return Convert.ToInt64(ts.TotalSeconds).ToString();  
}