为Silverlight 5应用程序添加编码UI支持时，为什么System.Core无法加载？

Question

我遇到以下问题：

尝试添加对Silverlight 5应用程序（[MSDN] [1]）创建编码UI测试的支持。第一步是在Silverlight 5项目中引用程序集Microsoft.VisualStudio.TestTools.UITest.Extension.SilverlightUIAutomationHelper.dll。不幸的是，参考已被添加之后，项目停止与多个类似的错误进行编译：

>

Error 25 Cannot resolve reference assemblies. Please check the reference assemblies. Could not load file or assembly 'System.Core, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ....\ErrorReportDialog.xaml 


Looks like System.Core 5.0.5.0 fails to load, okay, debugging assemblies loading with Fuslogw produces two interesting logs: 

First log: 

> Assembly Binder Log Entry (04.03.2013 @ 14:07:49) 
The operation was successful. 
Bind result: hr = 0x0. The operation completed successfully. 
Assembly manager loaded from: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll 
Running under executable C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe 
A detailed error log follows. 
=== Pre-bind state information === 
LOG: DisplayName = System.Core, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e 
(Fully-specified) 
LOG: Appbase = file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/ 
LOG: Initial PrivatePath = NULL 
LOG: Dynamic Base = NULL 
LOG: Cache Base = NULL 
LOG: AppName = MSBuild.exe 
Calling assembly : System.Windows, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e. 
LOG: This bind starts in LoadFrom load context. 
WRN: Native image will not be probed in LoadFrom context. Native image will only be probed in default load context, like with Assembly.Load(). 
LOG: Using application configuration file: C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe.Config 
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config. 
LOG: Post-policy reference: System.Core, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e 
LOG: Binding succeeds. Returns assembly from C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v5.0\System.Core.dll. 
LOG: Assembly is loaded in LoadFrom load context. 

Looks like System.Core, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e loads succesfully. 

But second log entry produces the following error: 

> Assembly Binder Log Entry (04.03.2013 @ 14:07:49) 
The operation failed. 
Bind result: hr = 0x80131040. No description available. 
Assembly manager loaded from: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll 
Running under executable C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe 
A detailed error log follows. 
Pre-bind state information 
LOG: DisplayName = System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e 
(Fully-specified) 
LOG: Appbase = file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/ 
LOG: Initial PrivatePath = NULL 
LOG: Dynamic Base = NULL 
LOG: Cache Base = NULL 
LOG: AppName = MSBuild.exe 
Calling assembly : Microsoft.VisualStudio.TestTools.UITest.Extension.SilverlightUIAutomationHelper, Version=10.0.30319.381, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a. 
LOG: This bind starts in default load context. 
LOG: Using application configuration file: C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe.Config 
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config. 
LOG: Redirect found in application configuration file: 2.0.5.0 redirected to 5.0.5.0. 
LOG: Post-policy reference: System.Core, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e 
LOG: The same bind was seen before, and was failed with hr = 0x80131040. 
ERR: Unrecoverable error occurred during pre-download check (hr = 0x80131040). 

貌似Microsoft.VisualStudio.TestTools.UITest.Extension.SilverlightUIAutomationHelper.dll尝试加载System.Core，Version = 2.0.5.0，Culture = neutral，PublicKeyToken = 7cec85d7bea7798e，但被重定向到System.Core，Version = 5.0.5.0，Culture = neutral，PublicKeyToken = 7cec85d7bea7798e（已从第1个日志载入），但仍然失败加载。

Can anyone provide some insight on how to further debug this problem? I'm compiling Silverlight projects for AnyCpu platform. 


    [1]: http://msdn.microsoft.com/en-us/library/gg413374.aspx 

Answer 1

，以确认SilverlightUIAuthomationHelper需要System.Core程序的版本，请执行下列操作：

1. 找到磁盘上所引用的DLL SilverlightUIAuthomationHelper。
2. 将其加载到任何反汇编器/反射器中 - 例如dotPeek或Reflector。引用的程序集的
3. 检查版本 - System.Core程序必须是2.0.5.0在SilverlightUIAuthomationHelper版本

可能的解决方案：

1. 更新SilverlightUIAuthomationHelper到新版本（链接在汉斯帕桑特评论）引用新的System.Core DLL（版本5.0.5.0）
2. 由于fuslogvw说，重定向从2.0.5.0到5.0.5.0位于应用程序配置文件 - 尝试找到并删除此重定向（details here）。但是其他的东西很可能会被打破。