XML for storing data?

Question

I am about to start developing a simple event manager application (WinForm) in C#. I have only two classes so far, called Event and Person. Event having attributes such as id, name, comment, start, end... My intention is to keep this program easy to use and install for the future users that's why I came to the idea of using XML for storing the users' data. I could use MSSQL as well, but that seems like an overkill in this case, and furthermore if the user does not have it installed it would certainly make the installation process longer... What do you guys think?