XmlDataContractSerializer middleware fails for Dictionary<string, object>

[Khungersumit]

Lesson 34. Demo - Implementing HATEOAS Support After POSTing)
Issue : change Accept Media type to application/xml

AddXmlDataContractSerializerFormatters middleware fails while serializing generated response for Dictionary<string, object>

In our case when we add links to Dictionary<string, object> for media-type *Accept: application/xml.

here are my dictionary's keys and values

Key1            value1
someKey1     someValue
key2             value2
someKey2     ICollection<TSource>

Serialization of this dictionarty response fails for media-type *Accept: application/xml.

[KevinDockx]

Afaik that type of serialization isn't supported out of the box by the XmlDataContractSerializer. To enable support, you can mark the the class you want to serialize with DataContract, and the members (including the dictionary) with DataMember. However, I believe that still might fail when the object isn't a simple type like string or int. If that's the case, creating a custom dictionary class that implements IXmlSerializable should do the trick! :)