private static string FilterResponse(string response)
{
var p = response;
while (true)
{
var ptr = p.IndexOf(" xmlns=");
if (ptr < 0)
break;
var ptrE = p.IndexOf(p[ptr + 7], ptr + 8);
if (ptrE <= ptr)
break;
p = p.Substring(0, ptr) + p.Substring(ptrE + 1);
}
return p;
}