Are you using DevExpress XPO ?
I had a similar problem, because FbErrorCollection does not implement
ICollection.
2012/11/21 André Knappstein <knappst...@beta-eigenheim.de>
>
> > On Wed, Nov 21, 2012 at 10:19 AM, André Knappstein
> > <knappst...@beta-eigenheim.de> wrote:
> >> As far as I understood this is because MS has put the classes required
> >> for "Extension" into another namespace in 4.5 than it was in 4.0
>
> > I don't think MS did that. It would break the application even from
> compiling.
>
> Okay, it's over my head to get this correct in the necessary detail
> :-)
>
> I created a new test.
> Using the following fbclient:
>
> http://sourceforge.net/projects/firebird/files/firebird-net-provider/3.0.2/NETProvider-3.0.2.0.msi/download
> titled "Version 3.0.2 for .NET 4.5/3.5/2.0 with Entity Framework
> support" on a system with 4.0.3 only, I get the following exception:
> Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute'
> from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral,
> PublicKeyToken=b77a5c561934e089'.
> I get this exception whenever an FBException should be raised.
> Provider itself is working fine.
>
> Using instead the following fbclient:
>
> http://sourceforge.net/projects/firebird/files/firebird-net-provider/3.0.2/NETProvider-3.0.2.0-NET40.7z/download
> titled "FirebirdClient - .NET 4.0, 7-Zip archive" on a system with
> 4.0.3 only, I do get the expected FBException
>
>
> No problem for me, once I know what to load where and where to
> install. I don't know if this will be a problem for others, though.
>
>
> I found the following answer which seems realistic to me, though I
> never used ILMerge and can't check too deep what else it might affect:
>
> https://connect.microsoft.com/VisualStudio/feedback/details/726702/moving-system-runtime-compilerservices-extensionattribute-to-mscorlib-breaks-structuremap-scans-of-namespaces-containing-extensionmethods-and-possibly-other-ioc-scenarios
>
>
>
>
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