Singleton Class for Unity3D

Singlenton.cs

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

public class Singlenton<T> : MonoBehaviour where T : Singlenton<T>
{
    // Generic Class with T = Tipo de variable
    private static T instance;
    public static T Instance 
    {
        get { return instance; }
    }
    public static bool isInitalized 
    {
        get { return instance != null; }
    }

    protected virtual void Awake() 
    {
        if(instance != null) 
        {
            Debug.LogError("[Singleton] Trying to instantiate a sceond instance of a singleton class.");
        }
        else 
        {
            instance = (T)this;
        }
    }
    protected virtual void OnDestroy() 
    {
        if (instance == this)
            instance = null;    
    }
}