Aprsing XML data receive from remote WebService in c#

Question

Dear all,

I have different web services that I am calling and receive from data from.

I need from those receive XML format data to parse the XML file and store dat to a local database.

The question I have is that  :

- Do I better store all XML retrun data as local files and then process them to database afterwards ?
- Do I better read and process each XML receive stream in memeory and store right away data to database ?

Thnaks for advise in term of perfomance or flexibility

regards