Ploeh AutoFixture was unable to create an instance from System.Runtime.Serialization.ExtensionDataObject

Question

We have an MVC project with references to WCF services. Those references added (ExtensionDataObject)ExtensionData property to every DTO and Response object and

Answer 1

The easiest way to do it is:

fixture.Register(() => null);

That registers to AutoFixture a specific way to initialize all the ExtensionDataObject, with the Func given. In this case the Func always returns null so you are good to go.