Bug 7329 - GetNetworkInterfaces causes an System.ArgumentException when Personal Hotspot turned on
Summary: GetNetworkInterfaces causes an System.ArgumentException when Personal Hotspot...
Status: RESOLVED DUPLICATE of bug 6413
Alias: None
Product: iOS
Classification: Xamarin
Component: Xamarin.iOS.dll ()
Version: 5.3.x
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-09-20 08:44 UTC by Dermot
Modified: 2012-09-20 09:14 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

Sample project. (8.40 KB, application/zip)
2012-09-20 08:44 UTC, Dermot

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Description Dermot 2012-09-20 08:44:26 UTC
Created attachment 2580 [details]
Sample project.

Version Info:
Installation UUID: (removed)
	Mono 2.10.9 (tarball)
	GTK 2.24.10
	GTK# (
	Package version: 210090011
Apple Developer Tools:
	 Xcode 4.5 (1839)
	 Build 4G182
Monotouch: 6.0.0
Mono for Android: Not Installed

Build information:
	Release ID: 30004007
	Git revision: ea0108260c6a376ecaeffcdb7d03387bd51edda3
	Build date: 2012-09-17 14:09:17+0000
	Xamarin addins: ec43fd5cb223ead4234a9858d1b56eef03dad53a-dirty
Operating System:
	Mac OS X 10.8.2
	Darwin MacbookAir.local 12.2.0 Darwin Kernel Version 12.2.0
	    Sat Aug 25 00:48:52 PDT 2012
	    root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64

Calling GetNetworkInterfaces() when personal hotspot is turned on causes an ArgumentException on the length property. At System.Array.Copy. More info by just calling System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces() when personal hotspot turned on.

How to reproduce.
Use on device, ios6. I am testing on an iPhone 4S.

Either download and use the sample app, or create a new Single view project, and replace its ViewDidLoad method with the code below (including the Alert() and the testButton declaration):

public UIButton testButton;

		public override void ViewDidLoad ()
			base.ViewDidLoad ();

			testButton = UIButton.FromType(UIButtonType.RoundedRect);
			testButton.Frame = new RectangleF(20f,100f,200f,44f);


			testButton.TouchUpInside+= delegate {
					// Perform any additional setup after loading the view, typically from a nib.
					var interfaces = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces();
					Alert(interfaces.Length.ToString() + " interfaces found.");
				catch(Exception error)



		public void Alert(string message)
				UIAlertView alert = new UIAlertView("Message",message,null,"OK",null);
Comment 1 Rolf Bjarne Kvinge [MSFT] 2012-09-20 09:14:48 UTC

*** This bug has been marked as a duplicate of bug 6413 ***