GenericContainer.cs

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using UnityEngine;
using System.Collections.Generic;

namespace HKI.Core.Containers
{
    public abstract class GenericContainer<T> : ScriptableObject
    {
        // Public variables
        public event System.Action OnValueChanged;

        // Private variables
        List<T> items = new List<T>();

        // Getter
        public List<T> Items { get { return items; } }
        public int Count { get { return items.Count; } }

        // Interface function
        public void Add(T item)
        {
            if(item != null && !items.Contains(item))
            {
                items.Add(item);
                if(OnValueChanged != null)
                    OnValueChanged();
            }
        }

        public void Remove(T item)
        {
            if(item != null)
            {
                items.Remove(item);
                if(OnValueChanged != null)
                    OnValueChanged();
            }
        }

        public void RemoveByIndex(int index)
        {
            if(index >= 0 && index < items.Count)
            {
                items.RemoveAt(index);
                if (OnValueChanged != null)
                    OnValueChanged();
            }
        }
    }
}