MEF Error message

Posted by cmaduro on Stack Overflow See other posts from Stack Overflow or by cmaduro
Published on 2010-05-14T22:24:05Z Indexed on 2010/05/14 22:34 UTC
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Can anybody explain this error message:

The composition remains unchanged. The changes were rejected because of the following error(s): The composition produced a single composition error. The root cause is provided below. Review the CompositionException.Errors property for more detailed information.

1) No valid exports were found that match the constraint '((exportDefinition.ContractName == "Silverbits.ApplicationServices.ApplicationServicesManager") AndAlso (exportDefinition.Metadata.ContainsKey("ExportTypeIdentity") AndAlso "Silverbits.ApplicationServices.ApplicationServicesManager".Equals(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))', invalid exports may have been rejected.

Resulting in: Cannot set import 'Silverbits.Applications.SilverbitsApplication.ApplicationServices (ContractName="Silverbits.ApplicationServices.ApplicationServicesManager")' on part 'Manpower4U.App'. Element: Silverbits.Applications.SilverbitsApplication.ApplicationServices (ContractName="Silverbits.ApplicationServices.ApplicationServicesManager") --> Manpower4U.App

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