C# 用参照カウンタのようなもの＞＜

RefCounterModoki.cs

using System;


namespace RefCounterModokiDev
{



    public interface IRefCounterInterface
    {
        /// <summary>
        /// No need to care. ( for RefCounter.AddRef(). )
        /// </summary>
        RefCounter ReferenceCounterObject { get; set; }
        void ReferenceCounterUpdate(int count);


        bool ReferenceCounterAutoDispose { get; }
    }

    public class RefCounter : IDisposable
    {
        public static RefCounter AddRef(IRefCounterInterface target)
        {
            target.ReferenceCounterObject = RefCounter.AddRef(target.ReferenceCounterObject);
            //target.ReferenceCounterObject += target.ReferenceCounterObject;

            target.ReferenceCounterObject.Parent = target;
            target.ReferenceCounterUpdate(target.ReferenceCounterObject.Count);
            return target.ReferenceCounterObject;
        }

        private static RefCounter AddRef(RefCounter referenceObject)
        {
            if (referenceObject != null)
            {
                referenceObject.IncrementCounter();
                return referenceObject;
            }
            else
            {
                return new RefCounter();
            }
        }

        //yomiyasusa ga bimyou?><;
        //
        //public static RefCounter operator +(RefCounter z, RefCounter referenceObject)
        //{
        //    return AddRef(referenceObject);
        //}

        //constructor
        public RefCounter()
        {
            Count = 1;
        }

        public int Count { get; private set; } = 0;
        public IRefCounterInterface Parent { get; set; }

        public void Release() => Dispose();
        public void Dispose()
        {
            if (Count > 0)
            {
                Count--;
            }
            Parent?.ReferenceCounterUpdate(Count);

            if (Count < 1 && Parent != null && Parent.ReferenceCounterAutoDispose)
            {
                DisconnectCounter(true);
            }
        }

        public void DisconnectCounter(bool dispose = false)
        {
            if (Parent != null)
            {
                Parent.ReferenceCounterObject = null;
                if (dispose && Parent is IDisposable)
                {
                    (Parent as IDisposable).Dispose();
                }
                Parent = null;
            }

        }

        public void IncrementCounter()
        {
            Count++;
        }

    }
    //--------------------------------------

    /// <summary>
    /// how to use!><
    /// </summary>
    public class DemoClass : IRefCounterInterface, IDisposable
    {
        public static void Demo()
        {
            DemoClass demoObject = new DemoClass();
            
            //こうしても使えるし
            RefCounter hDemoObject = RefCounter.AddRef(demoObject);

            //usingでも使える＞＜
            using (RefCounter.AddRef(demoObject))
            {
                using (RefCounter.AddRef(demoObject))
                {

                }
            }

            hDemoObject.Release();
        }

        // do not care this
        public RefCounter ReferenceCounterObject { get; set; }

        public bool ReferenceCounterAutoDispose
        {
            get { return true; }
        }

        public void ReferenceCounterUpdate(int count)
        {
            System.Diagnostics.Debug.WriteLine(count);
        }

        void IDisposable.Dispose()
        {
            System.Diagnostics.Debug.WriteLine("Demo Class: Dispose");
        }
    }
}