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I just created a new Blank App (Xamarin.Forms Portable) project. In error list window i get :
"Warning 4 Unexpected error - Please file a bug report at http://bugzilla.xamarin.com. Reason: System.IO.FileNotFoundException: Could not load assembly 'App16, Version=, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile? App16.Droid
Microsoft Visual Studio Ultimate 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Installed Version: Ultimate
Xamarin 3.11.445.0 (5061f92)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 188.8.131.52 (d23da369e436488f38c8ab8fe8a9ae7d9ea5256b)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.Forms Intellisense 1.0
Provides intellisense for Xamarin.Forms in the XML editor.
Xamarin.iOS 184.108.40.206 (7741cc495ab0baf04ff0405d0604bc27f0ecae2e)
Visual Studio extension to enable development for Xamarin.iOS.
Xamarin.iOS Unified Migration 1.0
Automated migration for Xamarin iOS Classic projects to Unified
Early preview of Xamarin Test Cloud integration
Derivative version of XAML Power Toys by Karl Shifflett originally designed and compiled for VS 2008 and 2010. This version has been rewritten in C# and is designed for installation in VS 2012.
Templates have gone through a big revision and this issue is not reproducible anymore. Marking as fixed for verification.
I will mark this as a duplicate of an older bug about this same _warning_.
Note that this message can also appear as an _error_. I have filed a separate bug about improving the wording of the _error_ in Bug 40782.
*** This bug has been marked as a duplicate of bug 23210 ***