How to read and write an xml file [on hold]

I have an lang_en.xml file and it contains the following format

<Language>
<Message>
<Code>LANGUAGE_ID</Code>
<Value>English</Value>
</Message>
</Language>

How can I read this xml format and parse and how to use the same in GUI. The old implementation of my code had the StreamReader to read the xml and the format of XML was

<String="009">Hello</String> 

and this was read using GetString().

public string HELLO { get { return GetString("009"); } }

Now I have to change the implementation to the format I specified in the <Language> tag. How can I do it?