Can I use DuckDNS on Windows 10 IoT Core and if so then is the setup same as Windows powershell instructions on their website. I would like to run ASP.NET Core service on my Raspberry 3 and connect to it via DuckDNS address.
Well it looks like a standard DynDNS protocol?
The only reason that ps script will not work is because it is trying to setuyp recurring jobs. I do not think you can do that yet on Win10 IoT.
By looking at the powershell file, all it is doing is a webrequest to a URL
$duckdns_url = "https://www.duckdns.org/update?domains=" + $strDomain + "&token=" + $strToken + "&ip=" + $strIP;
You can easily create a windows DLL that you can include in any of your UWP applciations so that it runs in a background thread every x minutes. Heck, it can even be an JSONP call (or AJAX if that url allows CrossSite)
It is very simple thing.
To be honest, it doesn't even need to run on the Pi - It can run on anything that is on the same network NAT and eventually uses the same public IP. So even another Pi with Raspbian, maybe a script on your router?