如何在xml数据的linq查询中使用TryParse？

I'm working with in memory xml of daily stock market data, and I'm getting the value "8/221/19055" for one of the dates. I see that TryParse is likely my best bet to check for a valid date, but the MSDN doc seems light on an explanation of the 2nd parameter "out DateTime result." How can I use it in my linq query below?I'm working with in memory xml of daily stock m