Keeping information on custom Inspector window using List of List

I am wondering if there is any way to get unity to serialize and save when I hit play button Lists List such as
List< List< bool>> example;
I have tried everything my custom class is serialized I have tried to mark it as SerializeField nothing seems to work. I am wondering if there is a work around I can use other than just using an array of array which would not be ideal.

fyi I am new to unity in general but been programming C# with xna for years

Try this:

[System.Serializable] // don't forget this!
public class ListOfBools {
    public List<bool> myBools;
}

public class MyScript : MonoBehaviour {
    public List<ListOfBools> myList;
}