I just attempted to serialize my random forest like this:

Serializer.Save<RandomForest>(forest, fileName); // forest is the obj, fileName is the path

Throws a RT error that it is not marked as serializable. Then I tried this:

using (FileStream fs = new FileStream(fileName, FileMode.Create)) { new BinaryFormatter().Serialize(fs, forest); }

I checked the definition and apparently it is 'ParallelOptions' breaking this. Not sure how to fix this (yet).