Basic singleton for C# Unity

Singleton.cs

using System;
using UnityEngine;

public abstract class Singleton<T> : MonoBehaviour, IDisposable where T : Singleton<T>
{
    public static T Instance { get; protected set; }

    void Awake()
    {
        if ( Instance != null && Instance != this )
        {
            DestroyImmediate( gameObject );
        }
        else
        {
            Instance = ( T )this;
        }
    }

    public virtual void Dispose()
    {
        if (Instance == this) {
            Instance = null;
        }
    }

    protected virtual void OnDestroy()
    {
        Dispose();
    }
}