using System;

namespace 继承与垃圾回收模型 {

    class Base : IDisposable {

        private bool _disposed;

        protected virtual void Dispose(bool disposing) {

            Console.WriteLine(string.Format("Base.Dispose({0})", disposing));

            if (!_disposed) {

                if (disposing) {

                    #region 清理Base自己的托管资源

                    #endregion

                }

                #region 清理Base自己的非托管资源

                #endregion

            }

            _disposed = true;

        }

        public void Base干活() {

            if (_disposed) {

                throw new ObjectDisposedException("Base");

            }

        }

        ~Base() {

            Console.WriteLine("~Base()");

            Dispose(false);

        }

        public void Dispose() {

            Console.WriteLine("");

            Dispose(true);

            GC.SuppressFinalize(this);

        }

    }

    class Child : Base {

        private bool _disposed;

        protected override void Dispose(bool disposing) {

            Console.WriteLine(string.Format("Child.Dispose({0})", disposing));

            if (!_disposed) {

                try {

                    if (disposing) {

                        #region 清理Child自己的托管资源

                        #endregion

                    }

                    #region 清理Child自己的非托管资源

                    #endregion

                    _disposed = true;

                }

                finally {

                    base.Dispose(disposing);

                }

            }

        }

        public void Child干活() {

            if (_disposed) {

                throw new ObjectDisposedException("爸爸");

            }

        }

        //“可以”为Child写析构方法，但没必要。内部的“Dispose(false)”也没必要

        ~Child() {

            Console.WriteLine("~Child()");

        }

    }

    class 回收示例 {

        /// <summary>

        /// 输出：

        /// -----以下为手动回收

        /// Child.Dispose(True)

        /// Base.Dispose(True)

        ///

        /// -----以下为自动回收

        /// ~Child()

        /// ~Base()

        /// Child.Dispose(False)

        /// Base.Dispose(False)

        /// </summary>

        /// <param name="args"></param>

        static void Main(string[] args) {

            Console.WriteLine("-----以下为手动回收");

            var 手动 = new Child();

            手动.Dispose();

            Console.WriteLine("/n/n-----以下为自动回收");

            var 自动 = new Child();

            GC.Collect();

        }

    }

}