GenericExtensionMethodTest.cs

using UnityEngine;
using System.Collections.Generic;

public class Test : MonoBehaviour
{
    void Start()
    {
        int?[] array1 = { null, null };
        int?[] array2 = { null, null };
        bool result = array1.ObjectEquals(array2);
        Debug.Log("Result:" + result);
    }
}

public static class IEnumerableExtensions
{
    public static bool ObjectEquals<T>(this IEnumerable<T> e1, IEnumerable<T> e2)
    {
        var n1 = e1.GetEnumerator();
        var n2 = e2.GetEnumerator();

        while (n1.MoveNext())
        {
            n2.MoveNext();
            if (!n1.Current.Equals(n2.Current)) return false;
        }

        return true;
    }
}