Serializing and Deserializing from/to XML inside Resources folder

Hi everyone,

I'm using a XML file to save all data about my levels in the game, and I'd like to include it automatically on build. So I was thinking to store the XML inside the Resources folder.

Fact is, the sample version of the XML serialize and deserialize functions use a filepath and a FileStream to Serialize/Deserialize the XML, while I need something like Resources.Load("leveldata.xml") and... something else to save the data in the same position.

Here's part of the code I'm using to serialize the content I need

             string filepath = Application.dataPath + @"/leveldata.xml";
 
             XmlSerializer serializer = new XmlSerializer(typeof(Levels));
             FileStream stream = new FileStream(filepath, FileMode.Create);
             serializer.Serialize(stream, _ls);
             stream.Close();

And here's the code I'm using to deserialize it:

             string filepath = Application.dataPath + @"/leveldata.xml";
 
             XmlSerializer serializer = new XmlSerializer(typeof(Levels));
             FileStream stream = new FileStream(filepath, FileMode.Open);
             levels = serializer.Deserialize(stream) as Levels;
             stream.Close();

What should I change to obtain what I'd like? Do you think there would be a better solution to save/load a bunch of levels to a XML file at runtime?

I'd like a cross/platform solution, that's why I'm thinking about the Resources folder.

Thank you for your time! ;)

EDIT: I forgot to mention that I'll be doing the editing from within the editor while using Play, but of course the final multi-platform build will have to access the Resources version of the file in another way, could you please point me to the right direction? Thank you!