Dual References to IXMLSerializable

Question

I have a class that implements IXMLSerializable in a .NET Standard Library, but I can't compile the library because it's referencing IXMLSerializable in two places. The output is as follows:

error CS0433: The type 'IXmlSerializable' exists in both 'System.Xml.ReaderWriter, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' and 'System.Xml.XmlSerializer, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

I only see one reference under the dependencies though (System.Xml.XmlSerializer), which I need for the XML attributes. This is my first crack at a .Net Standard Library, so is there something I'm missing here?

Answer 1

Try upgrading your reference to System.Xml.XmlSerializer to version 4.1.0.0. The error message says that you have two references to the library, but are using different versions. System.Xml.ReaderWriter is using a newer version than your project is, so you need to get that version.

You could also try removing your reference to System.Xml.XmlSerializer or switching it to an older version.