How to get Uri.EscapeDataString to comply with RFC 3986

Question

The Uri class defaults to RFC 2396. For OpenID and OAuth, I need Uri escaping consistent with RFC 3986.

From the System.Uri class documentation:

Answer 1

What version of the framework are you using? It looks like a lot of these changes were made in the (from MSDN) ".NET Framework 3.5. 3.0 SP1, and 2.0 SP1" timeframe.