How to decode Feedburner result containing \x3c and so on

Feed burner changed their blog service return results that it returns blocks of javascript similar to:

document.write("\x3cdiv class\x3d\x22feedburnerFeedBlock\x22 id\x3d\x22RitterInsuranceMarketingRSSv3iugf6igask14fl8ok645b6l0\x22\x3e"); document.write("\x3cul\x3e"); document.write("\x3cli\x3e\x3cspan class\x3d\x22headline\x22\x3e\x3ca href\x3d\x22

I want the raw html out of this. Previously I was able to easily just use .Replace to cleave out the document.write syntax but I can't figure out what kind of encoding this is or atleast how to decode it with C#.

Edit: Well this was a semi-nightmare to finally solve, here's what I came up with incase anyone has any improvements to offer

public static  char ConvertHexToASCII(this string hex){    if (hex == null) throw new ArgumentNullException(hex);    return (char)Convert.ToByte(hex, 16);}

.

private string DecodeFeedburnerHtml(string html){    var builder = new StringBuilder(html.Length);    var stack = new Stack<char>(4);    foreach (var chr in html)    {        switch (chr)        {            case '\\':                if (stack.Count == 0)                {                    stack.Push(chr);                }                else                {                    stack.Clear();                    builder.Append(chr);                }                break;            case 'x':                if (stack.Count == 1)                {                    stack.Push(chr);                }                else                {                    stack.Clear();                    builder.Append(chr);                }                break;            default:                if (stack.Count >= 2)                {                    stack.Push(chr);                    if (stack.Count == 4)                    {                        //get stack[3]stack[4]                        string hexString = string.Format("{1}{0}", stack.Pop(),                                                     stack.Pop());                        builder.Append(hexString.ConvertHexToASCII());                        stack.Clear();                    }                }                else                {                    builder.Append(chr);                }                break;        }    }    html = builder.ToString();    return html;}

Not sure what else I could do better. For some reason code like this always feels really dirty to me even though it's a linear time algorithm I guess this is related to how long it has to be.