缺少System.Windows.Freezable [英] System.Windows.Freezable is missing

问题描述

我有一个类库项目，我为我的WPF应用程序和RIA服务保留一些接口和类。

进入类的一个我想添加一个成员

  Brush BackgroundColor {set;得到; } 
   

或

  SolidColorBrush BackgroundColor {set;得到; } 
  

但我收到了这个错误。

错误2类型System.Windows.Freezable在未引用的程序集中定义。您必须向程序集WindowsBase，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = 31bf3856ad364e35'添加引用。

如果在添加引用窗口下如何解决它？我完全看不到该程序集？

解决方案

解决方案很简单。只需添加对以下三个DLL的引用：

WindowsBase.dll

strong> PresentationFramework.dll

$ b

.Net 4.5，这些DLL通常驻留在一个类似名称的目录中：C：\Program Files（x86）\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5

I have got a Class Library project where I keep some interfaces and classes for my WPF Application and RIA Services.

Into the one of class I want to add a member

Brush BackgroundColor { set; get; }

or

SolidColorBrush BackgroundColor { set; get; }

But I got this error.

Error 2 The type 'System.Windows.Freezable' is defined in an assembly that is not referenced. You must add a reference to assembly 'WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

What's up?

How to fix it if under Add Reference window I cannot see that assembly at all?

解决方案

The solution is simple. Just add references to the following three DLLs:

WindowsBase.dll

PresentationFramework.dll

PresentationCore.dll

In .Net 4.5, these DLL's typically reside in a directory with a name similar to: C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5

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