FinalizableResource.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GarbageCollectionExample_WPF
{
    class FinalizableResource : IDisposable
    {
        private readonly int _id;
        private static int _nextId = 1;
        private bool _disposed;

        public FinalizableResource()
        {
            _id = _nextId++;
            Trace.WriteLine($"Created FinalizableResource #{_id}");
        }

        ~FinalizableResource()
        {
            Trace.WriteLine($"Finalizer Called for #{_id}");
        }

        // Dispose method should be used to release unmanaged resources (like file handles,
        // database connections or unmanaged memory) and perform cleanup tasks when the object
        // is no longer needed. failing to release unmanaged resources can cause "resource leaks"
        // If the object holds references to other disposable objects, this should call their 
        // Dispose methods to clean them up.
        public void Dispose()
        {
            if (!_disposed)
            {
                Trace.WriteLine($"Dispose called for #{_id}");

                // GC.SuppressFinalize prevents Garbage Collection from calling the finalizer under the assumption 
                // you've handled all necessary resource cleanup in Dispose.
                GC.SuppressFinalize(this);
                _disposed = true;
            }
        }
    }
}