Other System.Core error - System.Core not found

Question

User851750305 posted

Hi all,

I have a website target to framework 3.5, this web site reference an class library (target to 3.5 framework too).

The Web.config of website has:

<assemblies>

<add assembly="Telerik.ReportViewer.WebForms, Version=3.2.9.1104, Culture=neutral, PublicKeyToken=A9D7983DFCC261BE"/>

<add assembly="Telerik.Reporting, Version=3.2.9.1104, Culture=neutral, PublicKeyToken=A9D7983DFCC261BE"/>

<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

<assemblies>

<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

....

When i try to run the site don't give me any error on the web config, and almost all pages shows without problems. 

The aspx pages that have this:

<%@ Register Assembly="System.Web.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" Namespace="System.Web.UI.WebControls" TagPrefix="asp" %>

and use an object defined in class library give me this error:

Could not load file or assembly 'System.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.

This is the stack trace:

[FileNotFoundException: Não foi possível carregar o ficheiro ou assemblagem 'System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' ou uma das respectivas dependências. O sistema não conseguiu localizar o ficheiro especificado.]
   System.ModuleHandle.ResolveType(Int32 typeToken, RuntimeTypeHandle* typeInstArgs, Int32 typeInstCount, RuntimeTypeHandle* methodInstArgs, Int32 methodInstCount) +0
   System.ModuleHandle.ResolveTypeHandle(Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext) +147
   System.Reflection.Module.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments) +203
   System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, Module decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, RuntimeMethodHandle& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) +133
   System.Reflection.CustomAttribute.IsCustomAttributeDefined(Module decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Boolean mustBeInheritable) +183
   System.Reflection.CustomAttribute.IsDefined(Assembly assembly, RuntimeType caType) +100
   System.Reflection.Assembly.IsDefined(Type attributeType, Boolean inherit) +53
   System.Data.Metadata.Edm.ObjectItemCollection.IsSchemaAttributePresent(Assembly assembly) +29
   System.Data.Metadata.Edm.ObjectItemCollection.LoadAssemblyFromCache(ObjectItemCollection objectItemCollection, Assembly assembly, Boolean loadReferencedAssemblies) +132
   System.Data.Metadata.Edm.ObjectItemCollection.LoadFromAssembly(Assembly assembly) +61
   System.Data.Metadata.Edm.MetadataWorkspace.LoadFromAssembly(Assembly assembly) +77
   System.Web.UI.WebControls.EntityDataSourceView.ConstructContext() +708
   System.Web.UI.WebControls.EntityDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments, Creator qbConstructor) +97
   System.Web.UI.WebControls.EntityDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +102
   System.Web.UI.WebControls.ListControl.OnDataBinding(EventArgs e) +95
   System.Web.UI.WebControls.ListControl.PerformSelect() +34
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
   System.Web.UI.WebControls.BaseDataBoundControl.OnPreRender(EventArgs e) +22
   System.Web.UI.WebControls.ListControl.OnPreRender(EventArgs e) +18
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

Other important aspects:
1) In my dev machine, everything works good
2) When i publish the compiled site to server show that error
3) The server has 1.1,2.0 and 3.5 framework installed, i check in GAC and i have there System.Core 3.5 assembly
4) The server is running windows XP pro SP 3 with all windows updates (it's the Portuguese language Version)
5) This is only happen when i have in the same page references to my class library and System.Web.Entity could be exist any relation to the error ?

Well, i really hope someone help me, i already check every post and do everything and i can't get it work.

Thanks in advance,

Rui Santos