C# 獲取時間戳

/// <summary> 
/// 獲取時間戳 
/// </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(); 
}