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Dynamics 365 Community / Forums / Microsoft Dynamics CRM (Archived) / Could not load type ...
Microsoft Dynamics CRM (Archived)

Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute'

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Posted on by litonn 913

Hi,

I'm using a plugin which communicate with another application through legacy asmx web services. But I'm getting the following error messages.

Unhandled Exception: System.TypeLoadException: Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
   at System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type)
   at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
   at System.ModuleHandle.ResolveTypeHandle(Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
   at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
   at 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)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
   at Microsoft.Crm.Asynchronous.V5ProxyPlugin..ctor(Type type, AsyncExecutionContext context, Boolean& isValid)
   at Microsoft.Crm.Asynchronous.EventOperation.InternalExecute(AsyncEvent asyncEvent)
   at Microsoft.Crm.Asynchronous.AsyncEventHandlerCommand`1.Execute(IAsyncEvent asyncEvent)
   at Microsoft.Crm.Asynchronous.AsyncEventExecutionManager`2.ExecuteHandler(IAsyncEventHandlerFactory handlerFactory)
   at Microsoft.Crm.Asynchronous.PoolHandler.ProcessAsyncEvent(IAsyncEventExecutionManager asyncEventExecutionManager)

I don't have this problem in QA or my local environment but exists in UAT and Production server. All servers are using .NET Framewrok 4.5.2 for CRM 2013. I don't know if it is a best practises to use web services in plugin or not. I don't get it why the plugin is looking into wrong .NET Framework(I believe it is 4.0) for ExtensionAttribute when its moved to 4.5.2.

Does anyone face the same problem?

thanks

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I have the same question (0)
  • Community Member Profile Picture
    Community Member on at

    Using web service within the plugin is acceptable. Verify if you are using the correct SDK for your plugin build accordingly to the roll up installed on the server.

    Thanks,

    Piotr

  • Suggested answer
    Community Member Profile Picture
    Community Member on at

    Hi Litonn,

    Please refer to the below link :

    stackoverflow.com/.../could-not-load-type-system-runtime-compilerservices-extensionattribute-from-as

    Hope this helps!

    I'd appreciate if you mark this as a Verified answer.

    Thanks,

    Mohit

  • litonn Profile Picture
    litonn 913 on at

    Hi,

    thanks for the reply. Initially I was using the CRM SDK 6.1.1 from NuGet but it has dependency on .NET Framework 4.0 and 4.5. So I removed the NuGet package and using the SDK from my Development Server bin folder. All CRM environments has the same roll up and service pack and still get the same error for 19 out of 250 records.

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