Inventory.menuItemCreateInventory C# (CSharp) Method

    public static void menuItemCreateInventory()
    {
        GameObject Canvas = null;
        if (GameObject.FindGameObjectWithTag("Canvas") == null)
        {
            GameObject inventory = new GameObject();
            inventory.name = "Inventories";
            Canvas = (GameObject)Instantiate(Resources.Load("Prefabs/Canvas - Inventory") as GameObject);
            Canvas.transform.SetParent(inventory.transform, true);
            GameObject panel = (GameObject)Instantiate(Resources.Load("Prefabs/Panel - Inventory") as GameObject);
            panel.GetComponent<RectTransform>().localPosition = new Vector3(0, 0, 0);
            panel.transform.SetParent(Canvas.transform, true);
            GameObject draggingItem = (GameObject)Instantiate(Resources.Load("Prefabs/DraggingItem") as GameObject);
            draggingItem.transform.SetParent(Canvas.transform, true);
            Inventory temp = panel.AddComponent<Inventory>();
            Instantiate(Resources.Load("Prefabs/EventSystem") as GameObject);
            panel.AddComponent<InventoryDesign>();
            temp.getPrefabs();
        }
        else
        {
            GameObject panel = (GameObject)Instantiate(Resources.Load("Prefabs/Panel - Inventory") as GameObject);
            panel.transform.SetParent(GameObject.FindGameObjectWithTag("Canvas").transform, true);
            panel.GetComponent<RectTransform>().localPosition = new Vector3(0, 0, 0);
            Inventory temp = panel.AddComponent<Inventory>();
            panel.AddComponent<InventoryDesign>();
            DestroyImmediate(GameObject.FindGameObjectWithTag("DraggingItem"));
            GameObject draggingItem = (GameObject)Instantiate(Resources.Load("Prefabs/DraggingItem") as GameObject);
            draggingItem.transform.SetParent(GameObject.FindGameObjectWithTag("Canvas").transform, true);
            temp.getPrefabs();
        }
    }