title: What's the easiest way to convert Wiki markup to HTML?
body: <p>I'm building a website that requires very basic markup capabilities. I can't use any 3rd party plugins, so I just need a simple way to convert markup to HTML. I might have a total of 3 tags that I'll allow.</p>
  <p>What is the best way to convert <code>==Heading==</code> to <code>&lt;h2&gt;Heading&lt;/h2&gt;</code>, or <code>--bold--</code> to <code>&lt;b&gt;bold&lt;/b&gt;</code>? Can this be done simply with Regex, or does somebody have a simple function?</p>
  <p>I'm writing this in C#, but examples from other languages would probably work.</p>