XML文件的数据量是多少，什么是基于文件的数据库备选方案？

I'm writing an application that keep track of a library of music, and I need a way to store the list of tracks, albums and other data. Usually for something like this I would use an XML file to save the data. And then I would use an ADO.NET DataTable to manipulate the data. But this program could potentially be saving a large number of data items. Also I'm going to want to be able to quickly search, sort, and filter the table of songs.I'm writing an application that keep track of a