在类构造函数中使用using语句有意义吗？ [重复]

Question

此问题已经在这里有了答案：

Windows service with FileSystemWatcher and Timer - making sure everything gets disposed（1个答案）

How to delete a particular instance of FileSystemWatcher object（1个答案）

Disposing of FileSystemWatcher（2个答案）

关闭2分钟前。

[我的意思是使用下面的语句，在我的类的构造函数中，我使用FileSystemWatcher实例，在这样的类构造函数中使用using语句是否有意义，还是必须在没有using语句的构造函数中使用它？] >

public partial class MyService : ServiceBase
        {
            FileInfo file;
            StreamWriter writer;
            FileSystemWatcher watcher1;
            FileSystemWatcher watcher2;
            FileSystemWatcher watcher3;

            public MyService()
            {
                InitializeComponent();

                file = new FileInfo(@"D:\LOGS\Log.txt");
                writer = file.CreateText();
    //I mean this using
                using (watcher1 = new FileSystemWatcher(@"C:\"))
                {
                    watcher1.Created += OnChanged;
                    watcher1.Deleted += OnChanged;
                    watcher1.Renamed += OnRenamed;
                    watcher1.Changed += OnChanged;
                    watcher1.EnableRaisingEvents = true;
                }
    //I mean this using
                using (watcher3 = new FileSystemWatcher(@"C:\Users"))
                {
                    watcher3.IncludeSubdirectories = true;
                    watcher3.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite |
                                            NotifyFilters.FileName | NotifyFilters.DirectoryName;
                    watcher3.Created += OnChanged;
                    watcher3.Deleted += OnChanged;
                    watcher3.Renamed += OnRenamed;
                    watcher3.Changed += OnChanged;
                    watcher3.Filter = "*.*";
                    watcher3.EnableRaisingEvents = true;
                }
     //I mean this using
                using (watcher2 = new FileSystemWatcher(@"D:\"))
                {
                    watcher2.IncludeSubdirectories = true;
                    watcher2.Created += OnChanged;
                    watcher2.Deleted += OnChanged;
                    watcher2.Renamed += OnRenamed;
                    watcher2.Changed += OnChanged;
                    watcher2.EnableRaisingEvents = true;
                }
            }

[我的意思是使用下面的语句，在我的类的构造函数中，我使用FileSystemWatcher实例，在这样的类构造器中使用using语句是否有意义，否则它必须是...

Answer 1

在运行服务时，应保持所有此FileSysteWatcher实例处于未处置状态。但是，在处理服务时，您还应该处理所有资源。因此，最好的解决方案是通过您的服务实现IDisposable并以Dispose方法处理所有资源。

Answer 2

Sergeys的回答已经很好，我只想补充一些理论。

Answer 3

您的意思是这样的？