对齐数据系列的有效/不同方式

Question

有哪些方法可以对齐2个数据系列（即股票数据）以使日期匹配？

我可以想到几个方法。

1. 复制较旧的数据以填写
2. 丢掉两组中缺少的日期

不知道如何有效地将其包裹起来以便有效地将数据存储在2个列表中。

这是我到目前为止所尝试的内容。不过我不喜欢这些比较类：

  baseBars = baseBars.Intersect(secondaryBars, new BarDateComparer()).ToList();
  secondaryBars = secondaryBars.Intersect(baseBars, new BarDateComparer()).ToList(); 

 public class BarDateComparer : IEqualityComparer<Bar>
    {

        public bool Equals(Bar x, Bar y)
        {

            return x.Date == y.Date;

        }       
        public int GetHashCode(Bar obj)
        {

            return obj.Date.GetHashCode();
        }

    }

Answer 1

LINQ方法怎么样：

var combinedSeries = from record in series1
            join record2 in series2
            on record.Date == record2.Date  into JoinedLists
            from joinedRecord in JoinedLists.DefaultIfEmpty()
            orderby record.Date
            select (whatever you want out of both records);