wcf - Invalid contract attribute for IMetadataExchange

Question

I have upgraded a WCF Service to .NET Framework 4.5. After doing so I noticed a blue squiggly line around the IMetaDataExchange in the host config file.

This is what the services section of the config looks like:

<services>
    <service behaviorConfiguration="MyBehavior" name="MyServiceHost">
        <endpoint binding="wsHttpBinding" bindingConfiguration="noSecurityBinding" contract="MyServiceContract"/>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>

When I hover the mouse over IMetadataExchange the error says:

The 'contract' attribute is invalid - The value 'IMetadataExchange' is invalid according to its datatype 'serviceContractType' - The Enumeration constraint failed.

The service seems to work fine. So I am curious why is this invalid.

question from:https://stackoverflow.com/questions/12408667/invalid-contract-attribute-for-imetadataexchange

Answer 1

Can you delete .SUO (solution Users Option file) file after closing VS? This will reset the cache for XMLEditor component in VS and will fix your problem.