Beginner XML Question

[bosco]

First of all, apologies if this has been answered elsewhere previously.

I'm in the midst of my final year uni project and I'm using C# to develop software for creating/storing American Football plays (in a playbook). What I'm trying to do is store each playbook as an XML file, with each XML file containing numerous instances of the element <play>.

I'm attempting to write the XML files in the following format:

<?xml version="1.0"?>
<playbook>
  <title>Playbook Title</title>
  <unit>Offence</unit>
  <play>
    <name>play name</name>
    <form>play formation</form>
    <set>formation set</set>
  </play>
  <play>
    <name>play name</name>
    <form>play formation</form>
    <set>formation set</set>
  </play>
  ... //numerous instances of <play>
</playbook>

I have a couple of questions:
1. Is this kind of formatting/syntax advisable for what I'm trying to do?
&
2. How would one go about this in C#?

At the moment I can write the xml file fine, but it can only store one instance of the <play> element.

Thanks in advance,
-Patrick