C#时间戳

格式化成：年月日时分秒

string timestamp = DateTime.Now.ToString("yyyyMMddHHmmss");

毫秒级时间戳

string timestamp = ((DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000).ToString();

秒级时间戳

string timestamp = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000.ToString();