C# can't find name or namespace name, what should I do?

Question

C++ / C#

the code

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

public class Inventory : MonoBehaviour
{
    public List<ItemInventory> items = new List<ItemInventory>();

    public GameObject gameObjectShow;

    public GameObject InventoryObject;

    public int maxCount;

    public DataBase data;

    public void AddItem(int id, Item item, int count)
    {
        items[id].id = item.id;
        items[id].count = count;
        items[id].itemGameObject.GetComponent<Image>().sprite = item.image; 

        if(count > 1 && item.id != 0)
        {
            items[id].itemGameObject.GetComponentInChildren<Text>().text = count.ToString();
        }
        else
        {
            items[id].itemGameObject.GetComponentInChildren<Text>().text = "";
        }
    }
    public void AddInventoryItem(int id, ItemInventory invItem)
    {
        items[id].id = invItem.id;
        items[id].count = invItem.count;
        items[id].itemGameObject.GetComponent<Image>().sprite = data.items[invItem.id].spr;

        if (invItem.count > 1 && invItem.id != 0)
        {
            items[id].itemGameObject.GetComponentInChildren<Text>().text = invItem.count.ToString();
        }
        else
        {
            items[id].itemGameObject.GetComponentInChildren<Text>().text = "";
        }
    }
    public void AddGraphics()
    {
        for(int i = 0; i < maxCount; i++)
        {
            GameObject newItem = Instantiate(gameObjectShow, InventoryObject.transform) as GameObject;

            newItem.name = i.ToString();
            ItemInventory ii = new ItemInventory();
            ii.itemGameObject = newItem;

            RectTransform rt = newItem.GetComponent<RectTransform>();
            rt.localPosition = new Vector3(0, 0, 0);
            rt.localScale = new Vector3(1, 1, 1);
            newItem.GetComponentInChildren<RectTransform>().localScale = new Vector3(1, 1, 1);

            Button tempButton = newItem.GetComponent<Button>();

            items.Add(ii);


        }
    }
}
[System.Serializable]
public class ItemInventory
{
    public int id;
    public GameObject itemGameObject;

    public int count;

}

script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DataBase : MonoBehaviour
{
    public List<Item> items = new List<Item>();
    void Start()
    {
              
    }
    [System.Serializable]
    public class Item
    {
        public string name; // id предмета
        public Sprite spr; // его спрайт
    }
}

Ошибка CS0246 Не удалось найти тип или имя пространства имен "Item" (возможно, отсутствует директива using или ссылка на сборку).

Answer 1

I also don't see where you have described the property imagein the classItem