How to serialize XML to file?

Question

I'm building an app that will snycronize user-selected directories. In the UI, a user can select several folder pairs for syncronization and schedule it for later. So, I want to store the paths to the selected directories (and other options) to an XML file. I'm new at this and not sure what is the best way to do this - I assume I need to serialize the object that contains the data and serialze it and write it to a file... ? Does this sound correct? Other ideas? Examples? Thanks!