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After creating a PCL project in Visual Studio where a BaseViewModel implements INotifyDataErrorInfo, creating an iOS project in the same solution, linking to the infrastructure project with said BaseViewModel causes the error:
The type 'System.ComponentModel.INotifyDataErrorInfo' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Windows, Version=126.96.36.199, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, Retargetable=Yes'.
System.Windows is not available to add a reference. The System.Windows reference is missing when creating a fresh Xamarin.iOS project in Visual Studio as well.
=== Xamarin Studio ===
Version 4.0.12 (build 3)
Installation UUID: e87d5e23-defc-4b93-9ee5-37011ddb1075
Mono 3.2.3 ((no/8d3b4b7)
Package version: 302030000
=== Apple Developer Tools ===
Xcode 5.0 (3332.25)
=== Xamarin.Mac ===
Xamarin.Mac: Not Installed
=== Xamarin.Android ===
Version: 4.8.1 (Starter Edition)
Android SDK: /Users/XXXX/Library/Developer/Xamarin/android-sdk-mac_x86
Supported Android versions:
2.1 (API level 7)
2.2 (API level 8)
2.3 (API level 10)
3.1 (API level 12)
4.0 (API level 14)
4.2 (API level 17)
Java SDK: /usr
java version "1.6.0_51"
Java(TM) SE Runtime Environment (build 1.6.0_51-b11-457-11M4509)
Java HotSpot(TM) 64-Bit Server VM (build 20.51-b01-457, mixed mode)
=== Xamarin.iOS ===
Version: 188.8.131.52 (Business Edition)
Build date: 2013-20-09 23:14:32-0400
=== Build Information ===
Release ID: 400120003
Git revision: 593d7acb1cb78ceeeb482d5133cf1fe514467e39
Build date: 2013-08-07 20:30:53+0000
Xamarin addins: 25a0858b281923e666b09259ad4746b774e0a873
=== Operating System ===
Mac OS X 10.8.5
Darwin XXX-MacBook-Pro.local 12.5.0 Darwin Kernel Version 12.5.0
Sun Sep 29 13:33:47 PDT 2013
This should be fixed in the latest alpha builds.
This fix is planned to be released with Xamarin.iOS 7.0.6, which should hit the beta channel before December 23rd.
I have verified this issue, following are the verified steps:
1. Created a PCL project in Visual Studio.
2. Created a sample iOS project.
3. Right click on "References" and click on add references option.
4. Observed that "System.Windows" is available in Framework assembly list.
Refer screen shot : http://screencast.com/t/9mrVeChHQIX
VS 2013, 2012