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.

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Answer 1

Could it be that you lost your references when you upgraded the project? I noticed this error when my project containing my client had no reference to my project with my service.

Answer 2

I added System.ServiceModel to the references for the project and it went away

Answer 3

I've solved the problem. If you ever change your C# class in Service1.cs and IService1.cs. Also update the name attribute in the service element "<namespace>.<classname>" and contract attribute in the endpoind element "<namespace>.<classname>" in your App.config.

BTW. sorry for the bad english :)

Answer 4

IF you running Intellisense on the warning. It will bring up a list for you to choose from you can Explicitly call that member.

Answer 5

If deleting the .SUO file doesn't work, check your references to ensure that you have the System.ServiceModel reference. That ended up being the issue that brought me here.