decode percent-encoded string c# .net

Question

How do I decode a string like the following:

name1=ABC&userId=DEF&name2=zyx&payload=%3cSTAT+xmlns%3axsi%3d%22http%3a%2f%2fwww.w3.org%2f2001%2fXMLSchema-instance%22%3e%3cREQ...

Background: I'm accepting an HTTP POST (name value pairs, basically) then converting the byte array to string with:

Encoding.UTF8.GetString(response, 0, response.Length);

I've tried the HtmlDecode method of WebUtility and HttpUtility but appear to get the same string back.

Answer 1

This should do the job for you:

System.Uri.UnescapeDataString(str)