What attribute do I need to save to RoamingSettings?

Like when I serialize my data, it needs a DataContract and DataMember attributes. I can serialize my class to XML, but I need to save it with RoamingSettings:

roamingSettings.Values["MyType"] = _mytype;

While debugging, I get this error message:

Data of this type is not supported.
WinRT information: Error trying to serialize the value to be written to the application data store

I guess I need an attribute, but which one?

Solution

Best way to handle this situation, is to serialize the object into string and store it.

Deserialize from the stored string value into target object.