在C++中经常可以看到格式为 ~ClassName() 的析构函数,而在C#中“析构函数”很少被提及。
到底是怎么回事?做个试验:
using System;
![](/Images/OutliningIndicators/None.gif)
public class Test
{
public Test()
{
Console.WriteLine("Test被构造。");
}
~Test()
{
Console.WriteLine("Test被析构。");
}
}
![](/Images/OutliningIndicators/None.gif)
public class Entrypoint
{
static void Main()
{
Test t = new Test();
}
}
用 ILDASM 打开,能够看见 ~Test() 被 Finalize()所取代。查阅MSDN,看到 Object.Finalize() 的说明是
到底是怎么回事?做个试验:
![](/Images/OutliningIndicators/None.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
用 ILDASM 打开,能够看见 ~Test() 被 Finalize()所取代。查阅MSDN,看到 Object.Finalize() 的说明是
允许 Object 在“垃圾回收”回收 Object 之前尝试释放资源并执行其他清理操作。
在 C# 中,使用析构函数语法表示终止程序。
看来为了统一基础结构并使用GC,C#的析构函数形式在.NET中只是Finalize的别名而已。