Paste code in html editor

Paste code in html editor

I need a tool where I can paste code and view it on a web page. I tried
TinyMCE 4.x. It works fine, but I found one problem: Indentation is not
kept when I paste code from Visual Studio. I googled, but I cant find a
solution to that, I tried fckeditor a couple of months ago. I has a syntax
highlighter, but if I recall correctly, it had the same problem with
indentation.
I need the tool to help me with three things: Write plain text Paste code
mainly from Visual Studio Upload image
Most of the google hits are from 2009-2010, so what do I use 2013? Should
I abandon the 'famous' editors and go for something in this 4 year old
article:
http://www.1stwebdesigner.com/css/16-free-javascript-code-syntax-highlighters-for-better-programming/
Im building this with asp.net 4.5
Or maybe just sum it up with one question: How did you get this kind of
requirement up & running?
Thanks