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Editorial Team
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Asked: 2026-06-13T04:14:22+00:00

I’m having a strange issue when trying to debug my app on a device.

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I’m having a strange issue when trying to debug my app on a device.

var url = "http://maps.googleapis.com/maps/api/geocode/xml?sensor=true&address=";
url += pin.Element("address").Value;
var address = XDocument.Load(url);

That last line gives me this error:

System.Net.WebException: Error: NameResolutionFailure
at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x00065] in /Developer/MonoTouch/Source/mono/mcs/class/System/System.Net/HttpWebRequest.cs:854
at System.Net.HttpWebRequest.GetResponse () [0x0000e] in /Developer/MonoTouch/Source/mono/mcs/class/System/System.Net/HttpWebRequest.cs:860
...

But it’s only on the actual device. If I run it in the Simulator, it works perfectly.

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1 Answer

  1. Editorial Team

    A NameResolutionFailure means a DNS error, likely because the device does not have internet access, no DNS configured or at least a different configuration (e.g. Wifi, 3G) from the one your Mac (running the simulator) is using.

    Can you access the internet from your device ? (e.g. airplane mode)

    If so can you try to access, on your device from Safari, the http://maps.googleapis.com site to see if the DNS servers, configured on your device, can find the host.

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