How can I combine two nodecollection?

问题

I got

var x =  document.DocumentNode.SelectNodes("*//tr[@class='even']")
var y = document.DocumentNode.SelectNodes("*//tr[@class='odd']")  

How can I combine these html node collections?

Edit:

gonna try x.Concat(y).ToList()

回答1:

Another option is using XPath approach. You can use XPath union (|) to combine two queries :

var xy = document.DocumentNode
                 .SelectNodes("*//tr[@class='even'] | *//tr[@class='odd']");

来源：https://stackoverflow.com/questions/23411107/how-can-i-combine-two-nodecollection