كيف يمكن التعامل مع XML?

XML is a good technique for storing and retrieving data

but you must read first about XML to know how to deal

with your data using XML standards, so I reccommed first

finding a good book in XML, then you can walkthrough

the examples within this book, and then begin your app

Also it's so good to read about XML Serialization on MSDN

to learn how to store and retrieve data in XML file using .Net

Also this article is very good, and don't forget to download

the example included, it's a good one as well

In addition if you want to store your data in a binary flat file

search MSDN about BinaryFormatter Class

Hope that helps