PooledMonoBehaviour.cs

using System;
using UnityEngine;

public class PooledMonoBehaviour : MonoBehaviour
{
    [SerializeField]
    private int initialPoolSize = 100;

    public int InitialPoolSize { get { return initialPoolSize; } }

    public event Action OnDestroyEvent;

    protected virtual void OnDisable()
    {
        if (OnDestroyEvent != null)
            OnDestroyEvent();
    }

    public T Get<T>(bool enable = true) where T : PooledMonoBehaviour
    {
        var pool = Pool.GetPool(this);
        var pooledObject = pool.Get<T>();

        if (enable)
        {
            pooledObject.gameObject.SetActive(true);
        }

        return pooledObject;
    }

    public T Get<T>(Transform parent, bool resetTransform = false) where T : PooledMonoBehaviour
    {
        var pooledObject = Get<T>(true);
        pooledObject.transform.SetParent(parent);

        if (resetTransform)
        {
            pooledObject.transform.localPosition = Vector3.zero;
            pooledObject.transform.localRotation = Quaternion.identity;
        }

        return pooledObject;
    }

    public T Get<T>(Transform parent, Vector3 relativePosition, Quaternion relativeRotation) where T : PooledMonoBehaviour
    {
        var pooledObject = Get<T>(true);
        pooledObject.transform.SetParent(parent);

        pooledObject.transform.localPosition = relativePosition;
        pooledObject.transform.localRotation = relativeRotation;

        return pooledObject;
    }

    public T Get<T>(Vector3 relativePosition, Quaternion relativeRotation) where T : PooledMonoBehaviour
    {
        var pooledObject = Get<T>(true);

        pooledObject.transform.localPosition = relativePosition;
        pooledObject.transform.localRotation = relativeRotation;

        return pooledObject;
    }
}