Jak zapisać dane do formatu (pliku) JSON i jak wczytać dane z JSON do Unity?

W przykładzie pokazane jest jak zapisać plik w bezpiecznej ścieżce (persistentDataPath) lub na pulpicie

public class SaveData : MonoBehaviour
{
    [SerializeField] private PotionData _PotionData = new PotionData();
    public void SaveIntoJson()
    {
        string potion = JsonUtility.ToJson(_PotionData);
        //System.IO.File.WriteAllText(Application.persistentDataPath + "/PotionData.json", potion);
        System.IO.File.WriteAllText(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop) + "\\TombstoneSave\\PotionData.json", potion);
        Debug.Log(Application.persistentDataPath);
    }

    public void LoadJson()
    {
        //string data = System.IO.File.ReadAllText(Application.streamingAssetsPath + "/PotionData.json");
        string data = System.IO.File.ReadAllText(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop) + "\\TombstoneSave\\PotionData.json");
        PotionData potionData = JsonUtility.FromJson<PotionData>(data);
        Debug.Log(potionData.potion_name);
    }
}

[System.Serializable]
public class PotionData
{
    public string potion_name;
    public int value;
    public List<Effect> effect = new List<Effect>();
}

[System.Serializable]
public class Effect
{
    public string name;
    public string desc;
}