asp.net wiki user control

I'm writing a asp.net web application in which I want the users to be able to apply simple formatting to the text they enter in text areas.

One of the possibilities is to use a javascript wisywig editor (like tinymce). However, to keep the text html-clean and readible, I'd prefer that the users have to do the formatting themselves in exactly the same way as it is done in wiki's.

I can't find a free or not too expensive control on the web. Has anyone used a third party control before? any advise on this?

From stackoverflow

• You can use a markdown editor like this:

  http://wmd-editor.com/

  Then you want to be able display the result in HTML with this:

  http://aspnetresources.com/blog/markdown_announced.aspx

  Essentially this is what StackOverflow does (with their customization). They discuss how they do it in their podcast.

  Steven Habex : This is indeed very usefull for my problem. Thanks a lot!