Question: I am developing an App where I would need to perform HTTP Request using C#.
Had in been PHP, I could use the HttpRequest class. Which class or group of class is best matched for the PHP HttpRequest by which I could make GET and POST Request.

Answer: 
See [QScintilla](http://www.riverbankcomputing.co.uk/software/qscintilla/intro). It has Javascript highlighting and (auto-)completion support built-in.
* Full-fledged code editor widget: [QCodeEdit](http://qcodeedit.org/)
* Very simple solution: [QtScript highlighter](http://www.qtcentre.org/threads/25501-QtScript-script-text-editor-for-Qt-4-4-3-with-Syntax-Highlighter) (MultiLineCommentHighlighter class is defined [here](http://www.qtcentre.org/archive/index.php/t-25483.html))