using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace MemRelease {     class Program     {         ~Program()         {             // Orders.         }         static void Main(string[] args)         {         }     } }

.method family hidebysig virtual instance void         Finalize() cil managed {   // Code size       14 (0xe)   .maxstack  1   .try   {     IL_0000:  nop     IL_0001:  nop     IL_0002:  leave.s    IL_000c   }  // end .try   finally   {     IL_0004:  ldarg.0     IL_0005:  call       instance void [mscorlib]System.Object::Finalize()     IL_000a:  nop     IL_000b:  endfinally   }  // end handler   IL_000c:  nop   IL_000d:  ret } // end of method Program::Finalize

public class Foo: IDisposable  {      public void Dispose()      {         Dispose(true);         GC.SuppressFinalize(this);      }      protected virtual void Dispose(bool disposing)      {         if (!m_disposed)         {             if (disposing)             {                // Release managed resources             }             // Release unmanaged resources             m_disposed = true;         }      }      ~Foo()      {         Dispose(false);      }      private bool m_disposed;  }

namespace 资源回收 {     class Program     {         static void Main(string[] args)         {             //使用using对实现IDisposable的类了进行资源管理 /*拿到一个对象的时候，首先判断这个对象是否实现了IDisposable接口，如果实现了，最好就用using包裹住这个对象，保证这个对象用完之后被释放掉，否则很可能出现资源泄露的问题 */             using (Telphone t1 = new Telphone())             {                 t1.Open();                 t1.Speak("hello");                 t1.Bomb();                 //t1.Dispose();//如果在这里调用了Dispose()方法释放资源，那么在执行t1.Open()方法就出错，电话线已经被剪断了，无法再打电话了                 t1.Open();                 t1.Speak("I am back!");             }//代码执行到这里后，就会调用Dispose方法来进行资源回收             Console.ReadKey();         }     }     /// <summary>     /// Telphone类实现了IDisposable接口     /// </summary>     class Telphone : IDisposable     {         /// <summary>         /// 电话状态         /// </summary>         private TelphoneState state;         /// <summary>         /// 打电话         /// </summary>         public void Open()         {             if (state == TelphoneState.Disposed)             {                 throw new Exception("电话线已经被剪断，无法打开！");             }             state = TelphoneState.Open;             Console.WriteLine("拿起电话");         }         /// <summary>         /// 说话         /// </summary>         /// <param name="s">说话内容</param>         public void Speak(string s)         {             if (state != TelphoneState.Open)             {                 throw new Exception("没有连接");             }             Console.WriteLine(s);         }         /// <summary>         /// 挂掉电话         /// </summary>         public void Bomb()         {             state = TelphoneState.Close;             Console.WriteLine("挂掉电话");         }         IDisposable 成员     }     /// <summary>     /// 电话状态枚举     /// </summary>     enum TelphoneState     {         Open, Close, Disposed     } }

public class ResourceHolder : IDisposable {       private bool isDispose ＝ false;       // 显示调用的Dispose方法 　 public void Dispose()       {            Dispose(true);           GC.SuppressFinalize(this);        }        // 实际的清除方法 　 protected virtual void Dispose(bool disposing)       {             if (!isDisposed)            {       　       if (disposing) 　　         {                       // 这里执行清除托管对象的操作.                   }                   // 这里执行清除非托管对象的操作             } 　        isDisposed=true;       }       // 析构函数       ~ResourceHolder()       {             Dispose (false);       } }