Object.Finalize 方法

!Object ()

~Object();

abstract member Finalize : unit -> unit
override this.Finalize : unit -> unit

Finalize ()

示例

以下示例验证 Finalize 在销毁替代 Finalize 的对象时是否调用了 方法。 请注意，在生产应用程序中， Finalize 将重写 方法以释放 对象持有的非托管资源。 另请注意，C# 示例提供了一个析构函数，而不是重写 Finalize 方法。

using System;
using System.Diagnostics;

public class ExampleClass
{
   Stopwatch sw;

   public ExampleClass()
   {
      sw = Stopwatch.StartNew();
      Console.WriteLine("Instantiated object");
   }

   public void ShowDuration()
   {
      Console.WriteLine("This instance of {0} has been in existence for {1}",
                        this, sw.Elapsed);
   }

   ~ExampleClass()
   {
      Console.WriteLine("Finalizing object");
      sw.Stop();
      Console.WriteLine("This instance of {0} has been in existence for {1}",
                        this, sw.Elapsed);
   }
}

public class Demo
{
   public static void Main()
   {
      ExampleClass ex = new ExampleClass();
      ex.ShowDuration();
   }
}
// The example displays output like the following:
//    Instantiated object
//    This instance of ExampleClass has been in existence for 00:00:00.0011060
//    Finalizing object
//    This instance of ExampleClass has been in existence for 00:00:00.0036294

open System.Diagnostics

type ExampleClass() =
    let sw = Stopwatch.StartNew()
    do 
        printfn "Instantiated object"

    member this.ShowDuration() =
        printfn $"This instance of {this} has been in existence for {sw.Elapsed}"

    override this.Finalize() =
        printfn "Finalizing object"
        sw.Stop()
        printfn $"This instance of {this} has been in existence for {sw.Elapsed}"

let ex = ExampleClass()
ex.ShowDuration()
// The example displays output like the following:
//    Instantiated object
//    This instance of ExampleClass has been in existence for 00:00:00.0011060
//    Finalizing object
//    This instance of ExampleClass has been in existence for 00:00:00.0036294

Imports System.Diagnostics

Public Class ExampleClass
   Dim sw As StopWatch
   
   Public Sub New()
      sw = Stopwatch.StartNew()
      Console.WriteLine("Instantiated object")
   End Sub 

   Public Sub ShowDuration()
      Console.WriteLine("This instance of {0} has been in existence for {1}",
                        Me, sw.Elapsed)
   End Sub
   
   Protected Overrides Sub Finalize()
      Console.WriteLine("Finalizing object")
      sw.Stop()
      Console.WriteLine("This instance of {0} has been in existence for {1}",
                        Me, sw.Elapsed)
   End Sub
End Class

Module Demo
   Public Sub Main()
      Dim ex As New ExampleClass()
      ex.ShowDuration()
   End Sub
End Module
' The example displays output like the following:
'    Instantiated object
'    This instance of ExampleClass has been in existence for 00:00:00.0011060
'    Finalizing object
'    This instance of ExampleClass has been in existence for 00:00:00.0036294

有关替代 Finalize 方法的其他示例，请参阅 GC.SuppressFinalize 方法。

注解

有关此 API 的详细信息，请参阅 Object.Finalize 的补充 API 备注。

另请参阅

• SuppressFinalize(Object)
• ReRegisterForFinalize(Object)
• WaitForPendingFinalizers()
• WeakReference