C#4.0: To delete all nodes of an XML file

Hello

I have an XML file:

<?xml version="1.0" encoding="UTF-8" ?>
- <dataroot xmlns:od="urn:schemas-microsoft-com:officedata" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Test.xsd" generated="2016-09-16T22:06:41">
- <Table2><ID>1</ID><Name>A</Name></Table2>
- <Table2><ID>2</ID><Name>B</Name></Table2></dataroot>