Microsoft.Data.Analysis.DataFrame Join should produce a result with a single joined column

Given two DataFame objects it should be easy to perform a simple outer join to achieve these results:

DataFrame1:
Date | ClosePrice
-- | --
3/1/2022 12:00:00 AM | 10.5
3/2/2022 12:00:00 AM | 12.4
3/3/2022 12:00:00 AM | 11.3

DataFrame2:
Date | ShortPercent
-- | --
3/1/2022 12:00:00 AM | 2.34
3/2/2022 12:00:00 AM | 2.36
3/3/2022 12:00:00 AM | 3.01
3/4/2022 12:00:00 AM | 3.04

Resulting DataFrame:
Date | ClosePrice | ShortPercent
-- | -- | --
3/1/2022 12:00:00 AM | 10.5 | 2.34
3/2/2022 12:00:00 AM | 12.4 | 2.36
3/3/2022 12:00:00 AM | 11.3 | 3.01
3/4/2022 12:00:00 AM | null | 3.04

This does not seem to be possible with the current Merge or Join methods, since they end up with two columns for Date (Date_left and Date_right) in the resulting DataFrame and combining those to a single column seems complex and error prone.