How to delete object?

Question

I need to create a method of class that delete the instance.

public class Car
{
    private string m_Color;

    public string Color
    {
        get { return m         


        

Answer 1

FLCL's idea is very correct, I show you in a code:

    public class O1 where T: class
    {
        public Guid Id { get; }
        public O1(Guid id)
        {
            Id = id;
        }
        public bool IsNull => !GlobalHolder.Holder.ContainsKey(Id);
        public T Val => GlobalHolder.Holder.ContainsKey(Id) ? (T)GlobalHolder.Holder[Id] : null;
    }
    public class GlobalHolder
    {
        public static readonly Dictionary Holder = new Dictionary();
        public static O1 Instantiate() where T: class, new()
        {
            var a = new T();
            var nguid = Guid.NewGuid();
            var b = new O1(nguid);
            Holder[nguid] = a;
            return b;
        }
        public static void Destroy(O1 obj) where T: class
        {
            Holder.Remove(obj.Id);
        }
    }

    public class Animal
    {

    }

    public class AnimalTest
    {
        public static void Test()
        {
            var tom = GlobalHolder.Instantiate();
            var duplicateTomReference = tom;
            GlobalHolder.Destroy(tom);
            Console.WriteLine($"{duplicateTomReference.IsNull}");
            // prints true
        }
    }

Note: In this code sample, my naming convention comes from Unity.