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If you open an android project and go to the project settings. (works with creating a new project as well)
You then try and change the Compile using Android version dropdown and you get an error.
The addin cannot recover from this. You have to force quit VS to fix it.
This is reproducible in the the latest alpha or stable
If you try and change the Target Android version you get a similar error. Those three drop-downs just don't work like they should.
Microsoft Visual Studio Professional 2013
Version 12.0.21005.1 REL
Microsoft .NET Framework
Xamarin.Android 4.10.01073 (d23a19bf)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 1.8.365 (8cb9dbd0)
Visual Studio extension to enable development for Xamarin.iOS
I have exactly the same problem.
Here are some details of the error
Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
at VSLangProj80.ProjectProperties3.set_RootNamespace(String pbstrRootNamespace)
at Mono.Android.VisualStudio.ApplicationPage.ApplyChanges() in c:\Users\Dean\Documents\Projects\Xamarin\XamarinVS\Mono.Android.VisualStudio\PropertyPages\ApplicationPage.cs:line 188
at Mono.VisualStudio.Extension.TastyPropertyPage.Apply() in c:\Users\Dean\Documents\Projects\Xamarin\XamarinVS\Mono.VisualStudio.Extension\FlavorProject\TastyPropertyPage.cs:line 228
at Microsoft.VisualStudio.Editors.ApplicationDesigner.PropertyPageSite.ApplyStatusChange(UInt32 dwFlags)
I tried downloading the debug symbols and disabling Just My Code to see if we could get a better stack trace and now the bug is not happening.
I see the same error - together with other exceptions in other project types in VS2013 - seems likely related to Bug 16434. I also see issues similar to those reported in Bug 16326.
*** This bug has been marked as a duplicate of bug 16434 ***