Html Encoding and Decoding

If you want to be sure of reliable transmission over HTTP, it is advisable to HTMLEncode your text.  Another purpose to use HtmlEncoding, is to embed text in your XML files. 

You can use the HttpUtility class which i mentioned in this previous post: UrlEncode for a hyperlink without a HTTPContext

I used this time MSDN to find back the HtmlEncode method. You can find here: HttpUtility Members on MSDN