How to add a new element in a XML file?

[Samir]

Hi all,

Let say I have the following XML file:
<?xml version="1.0" ?>
<Store>

<cdCollect>
<cd id="1">
<title>Latest Hits</title>
<price>17.3</price>
</cd>
</cdCollect>

<Books>
<book id = "1">
<title>ASP.NET</title>
<isbn>121212</isbn>
<price>32.65</price>
</book>
<book id = "2">
<title>Visual C#</title>
<isbn>4433434</isbn>
<price>56.32</price>
</book>
<book id = "3">
<title>ADO.NET</title>
<isbn>43434</isbn>
<price>55.65<.price>
</book>
</Books>

</Store>
Now, how can I do the following by using C#:

1. How to insert a new element with child nodes as shown below under
<Books>...</Books>? :
<book id = "4">
<title>XML Bible</title>
<isbn>77676</isbn>
<price>85.65</price>
</book>
Thank you,

Your help is very very much appreciated.

Regards,

Samir