Answer by Kirill Polishchuk for Writing special characters to xml in c#

XDocument escapes them itself.

<Student><ID>><&"</ID></Student> isn't well-formed XML.

Well-formed version, which produces XDocument is:

<Student><ID>&gt;&lt;&amp;"</ID></Student>

You can use this code (uses CDATA):

XElement Config = new XElement("Student", new XElement("ID", new XCData("><&\"")));

Output:

<Student><ID><![CDATA[><&"]]></ID></Student>