I'm having a problem where one Dictionary in my project is either not serializing or not deserializing. After deserializing, the data I serialized is simply not in the object.

Here's the relevant snip of the class being serialized:

class Person : ISerializable {
    private Dictionary<Relation,List<int>> Relationships = new Dictionary<Relation,List<int>>();

    public Person(SerializationInfo info, StreamingContext context) {
        this.Relationships = (Dictionary<Relation, List<int>>) info.GetValue("Relationships", typeof(Dictionary<Relation, List<int>>));
        }

    public void GetObjectData(SerializationInfo info, StreamingContext context) {
        info.AddValue("Relationships", this.Relationships);
        }
    }

Note, this is binary serialization. Everything else in the project serializes and deserialzes correctly.