How to overwrite array elements in List?

Question

C++ / C#

Good day. I'm making a game that has categories of questions. The player can choose categories independently, any. I can't make it so that multiple categories are added to the List<>. Variables are simply overwritten. And how to make the array not overwritten, but simply replenished?
That's what I'm doing:

public class Game : MonoBehaviour {
public CategoryList[] category = new CategoryList[9];
[HideInInspector]
public Toggle toggleSports, toggleGeo, toggleHistory, toggleFilmTV, toggleTech, toggleAnimal, toggleStars, toggleMusic, toggleChildren, toggleAll;
public WordsList[] words = new WordsList[10];

List<object> wordList;

public void StartGame()
{
wordList = new List<object>(words);
// Проверяем какие категории отмечены
for (int i = 0; i < words.Length; i++)
{
if (toggleSports.isOn == true)
{
words[i].word = LangSystem.lng.sports[i];
}
if (toggleGeo.isOn == true)
{
words[i].word = LangSystem.lng.geo[i];
}
Debug.Log(words[i].word);
}
WordsGenerate();
}

[System.Serializable]
public class CategoryList
{
public string[] catName = new string[9];
public WordsList[] words;
}

[System.Serializable]
public class WordsList
{
public string word;
}
}

As a result, only the second category is recorded, and I need them not to be overwritten, but added. Please tell me how to do it? Thank you very much in advance.

Answer 1

"And how to make the array not overwritten, but simply replenished?"
The array cannot be replenished, it has a fixed size, which is set when it is created.
Instead of an array, use List.
List.Add(category); - to add a category.
List.Remove(category); - to delete.