Write < and > in place of &lt; and &gt; in text file

Question

I am writing the XML into test file but when it writes the XML into text file it replaces the < and > with the &lt; and &gt;. I have tried many ways i.e. HTMLUtility.HtmlEncode and decode method to do the same but could not succeed. I am trying this XML into text file with .txt extension.

 

Is there any way to do it? Please help its urgent.