Ошибка сборки: Reference PresentationCore не удалось решить

Question

У меня есть приложение WPF C#, размещенное на GitHub, прикрепленное к Travis. Я настроил мой .travis-ci.yml таким образом:

language: csharp 
solution: FaceDetection/FaceDetection.sln 

script: 
    - xbuild /p:Configuration=Debug /p:Platform=x86 /p:TargetFrameworkVersion="v4.0" FaceDetection/FaceDetection.sln 

Однако я получаю эти ошибки, когда проект о компиляции Трэвис:

/usr/lib/mono/4.5/Microsoft.Common.targets: warning : Reference 'PresentationCore' not resolved 
/usr/lib/mono/4.5/Microsoft.Common.targets: warning : Reference 'PresentationFramework' not resolved 

компиляцией проекта локально на моей машине окон в VS работает отлично. Поэтому я включил все необходимые ссылки для проекта.

Это происходит еще несколько ссылок тоже:

Views/Converters/BitmapConverter.cs(5,28): error CS0234: The type or namespace name `Imaging' does not exist in the namespace `System.Windows.Media'. Are you missing an assembly reference? 
Views/UserControls/FaceDatabaseEntry.xaml.cs(7,22): error CS0234: The type or namespace name `Controls' does not exist in the namespace `System.Windows'. Are you missing an assembly reference? 
Views/UserControls/FaceDatabaseEntry.xaml.cs(9,22): error CS0234: The type or namespace name `Documents' does not exist in the namespace `System.Windows'. Are you missing an assembly reference? 
Views/UserControls/FaceDatabaseEntry.xaml.cs(12,28): error CS0234: The type or namespace name `Imaging' does not exist in the namespace `System.Windows.Media'. Are you missing an assembly reference? 
Views/UserControls/FaceDatabaseEntry.xaml.cs(13,22): error CS0234: The type or namespace name `Navigation' does not exist in the namespace `System.Windows'. Are you missing an assembly reference? 
Views/UserControls/FaceDatabaseEntry.xaml.cs(14,22): error CS0234: The type or namespace name `Shapes' does not exist in the namespace `System.Windows'. Are you missing an assembly reference? 
ViewModel/AddFaceViewModel.cs(13,38): error CS0012: The type `System.ComponentModel.INotifyPropertyChanged' is defined in an assembly that is not referenced. Consider adding a reference to assembly `System.ObjectModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' 

необходимые пакеты будут восстановлены в порядке, прежде чем он собирается составить:

Installing 'PostSharp.Patterns.Model 4.2.27'. 
Installing 'System.Data.SQLite.Linq 1.0.101.0'. 
Installing 'PostSharp.Patterns.Common 4.2.27'. 
Installing 'ZedGraph 5.1.7'. 
Installing 'MahApps.Metro 1.3.0-ALPHA160'. 
Installing 'MvvmLight 5.3.0.0'. 
Installing 'DirectShowLib 1.0.0'. 
Installing 'System.Data.SQLite.Core 1.0.101.0'. 
Installing 'CommonServiceLocator 1.3'. 
Installing 'System.Data.SQLite.EF6 1.0.101.0'. 
Installing 'PostSharp 4.2.27'. 
Installing 'System.Data.SQLite 1.0.101.0'. 
Installing 'OpenTK 1.1.2349.61993'. 
Installing 'EmguCV 3.1.0'. 
Installing 'OpenTK.GLControl 1.1.2349.61993'. 
Installing 'EntityFramework 6.1.3'. 

Successfully installed 'PostSharp.Patterns.Model 4.2.27'. 
Successfully installed 'PostSharp.Patterns.Common 4.2.27'. 
Successfully installed 'DirectShowLib 1.0.0'. 
Successfully installed 'MvvmLight 5.3.0.0'. 
Successfully installed 'ZedGraph 5.1.7'. 
Successfully installed 'CommonServiceLocator 1.3'. 
Successfully installed 'OpenTK 1.1.2349.61993'. 
Successfully installed 'System.Data.SQLite.Linq 1.0.101.0'. 
Successfully installed 'PostSharp 4.2.27'. 
Successfully installed 'System.Data.SQLite 1.0.101.0'. 
Successfully installed 'OpenTK.GLControl 1.1.2349.61993'. 
Successfully installed 'System.Data.SQLite.EF6 1.0.101.0'. 
Successfully installed 'EntityFramework 6.1.3'. 
Successfully installed 'MahApps.Metro 1.3.0-ALPHA160'. 
Successfully installed 'MvvmLightLibs 5.3.0.0'. 
Successfully installed 'System.Data.SQLite.Core 1.0.101.0'. 
Successfully installed 'EmguCV 3.1.0'. 

версии моно и xbuild:

$ mono --version 

Mono JIT compiler version 4.2.3 (Stable 4.2.3.4/832de4b Wed Mar 16 13:19:08 UTC 2016) 

Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com 
    TLS:   __thread 
    SIGSEGV:  altstack 
    Notifications: epoll 
    Architecture: amd64 
    Disabled:  none 
    Misc:   softdebug 
    LLVM:   supported, not enabled. 
    GC:   sgen 


$ xbuild /version 

XBuild Engine Version 12.0 
Mono, Version 4.2.3.0 
Copyright (C) 2005-2013 Various Mono authors 

Answer 1

В принципе, WPF не поддерживается Mono (или .NET работает на любой платформе, отличной от Window с).

Вместо этого вам необходимо найти службу CI на базе Windows, такую ​​как AppVeyor.