问题
I'm having the following problem:
Trying to add support for creating coded UI test for Silverlight 5 application ([MSDN][1]). First step is to reference assembly Microsoft.VisualStudio.TestTools.UITest.Extension.SilverlightUIAutomationHelper.dll in Silverlight 5 project. Unfortunately, after the reference has been added, projects stops to compile with a number of similar errors:
>
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).
Looks like Microsoft.VisualStudio.TestTools.UITest.Extension.SilverlightUIAutomationHelper.dll tries to load System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, but is being redirected to System.Core, Version=5.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e (already loaded from 1st log) and still fails to load.
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
回答1:
To confirm version of System.Core required by SilverlightUIAuthomationHelper do the following:
- find the referenced SilverlightUIAuthomationHelper dll on disk.
- load it up in any disassembler/reflector - for example dotPeek or Reflector.
- check versions of referenced assemblies - System.Core must be 2.0.5.0 in your version of SilverlightUIAuthomationHelper
Possible solutions:
- update SilverlightUIAuthomationHelper to the new version (link in the Hans Passant comment) that references new System.Core dll (version 5.0.5.0)
- Because fuslogvw says that redirect from 2.0.5.0 to 5.0.5.0 is located in the APPLICATION configuration file - try to find and remove this redirect (details here). But it is very possible that something else will break.
来源：https://stackoverflow.com/questions/15201164/why-system-core-fails-to-load-when-adding-coded-ui-support-for-silverlight-5-app