We recently upgraded our web app from 3.5 to 4.0. Now after I login and load a page with Microsoft ScriptManager on it, I get a "ould not load file or assembly 'System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies. The system cannot find the file specified.", but it only happens the first time, reload the page and everything works.
UPDATE: We have all Silverlight v4 projects.I found the System.Windows.dll in the C:\Program Files\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0 directory. Why would it look for version 2.0?
Here's the entire exception (edited and removed folder paths)
Server Error in '/test' Application.
Could not load file or assembly 'System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies. The system cannot find the file specified. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies. The system cannot find the file specified.
Source Error:
Line 450: Line 451: Line 452: Line 453: Line 454:
Source File: c:{directories}\Pages\Administration\DisplayCreateEdit.aspx Line: 452
Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' could not be loaded.
WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
Stack Trace:
[FileNotFoundException: Could not load file or assembly 'System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies. The system cannot find the file specified.] System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type) +0 System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext) +180 System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments) +192 System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) +115 System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent) +426 System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType) +103 System.Reflection.RuntimeAssembly.GetCustomAttributes(Boolean inherit) +33 System.Web.UI.AssemblyCache.GetAjaxFrameworkAssemblyAttribute(Assembly assembly) +76 System.Web.UI.ScriptManager.get_DefaultAjaxFrameworkAssembly() +388 System.Web.UI.ScriptManager..ctor() +26 ASP.pages_administration_displaycreateedit_aspx.__BuildControlScriptManager1() in c:{directories}\Pages\Administration\DisplayCreateEdit.aspx:452 ASP.pages_administration_displaycreateedit_aspx.__BuildControlContent1(Control __ctrl) in c:{directories}\Pages\Administration\DisplayCreateEdit.aspx:9 System.Web.UI.CompiledTemplateBuilder.InstantiateIn(Control container) +12 System.Web.UI.MasterPage.InstantiateInContentPlaceHolder(Control contentPlaceHolder, ITemplate template) +87 ASP.master_master.__BuildControlContentPlaceHolder1() in c:{directories}\Master.master:28 ASP.master_master.__BuildControlmasterForm() in c:{directories}\Master.master:13 ASP.master_master.__BuildControlTree(master_master __ctrl) in c:{directories}\Master.master:1 ASP.master_master.FrameworkInitialize() in c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\zoning\dff1a5fe\99aa3a7f\App_Web_shgw15qp.4.cs:0 System.Web.UI.UserControl.InitializeAsUserControlInternal() +35 System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +8832342 System.Web.UI.Page.get_Master() +54 System.Web.UI.Page.ApplyMasterPage() +15 System.Web.UI.Page.PerformPreInit() +45 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +328
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
and the system.web of our web.config
See the same problem here and Microsoft Feedback/Bug report
Edit: I'm running VS 2010, XP with IIS 5.0 (I miss Win 7 at work every day :-)). We have the web app running under the local IIS instance, not Cassini. We deployed it to a test server and I did not see the exception. After I installed the C:\Program Files\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0\System.windows.dll to the GAC and then removed it and haven't seen the same exception, though my colleague hasn't done this and still sees it occasionally. I think it only happens when the app is restarted (which happens every time we rebuild the app when developing locally).