無法訪問該檔案，因為它正在被使用

我需要使用 FileSystemWatcher 將操作從 dir1 同步到 dir2。當我在 dir1 中創建一個新檔案時，相同的檔案必須在 dir2 中，如果我洗掉/重命名/移動，也應該在 dir2 中。
當我在 dir1 中創建檔案時，它也在 dir2 中創建，但是當我嘗試在 dir1 中重命名檔案時，我得到這個例外： 未處理的例外。System.IO.IOException：該行程無法訪問檔案“C:\Users\artio\Desktop\FASassignment\root\dir1\g.txt”，因為它正被另一個行程使用。 當我用谷歌搜索時，可能會出現此錯誤，因為流未關閉，但我不知道我是否使用了一個。另外，當我在其中創建一個子檔案夾和一個檔案時，我收到一個錯誤，即找不到路徑并且在 dir2 中它沒有創建，你能幫我解決這兩個錯誤嗎？提前致謝！
程式：

public class Program2
{
    public static void Main(string[] args)
    {
        string sourcePath = @"C:\Users\artio\Desktop\FASassignment\root\dir1";
        string destinationPath = @"C:\Users\artio\Desktop\FASassignment\root\dir2";

        var source = new DirectoryInfo(sourcePath);
        var destination = new DirectoryInfo(destinationPath);

        using var sourceWatcher = new FileSystemWatcher(sourcePath);

        sourceWatcher.NotifyFilter = NotifyFilters.Attributes
                             | NotifyFilters.CreationTime
                             | NotifyFilters.DirectoryName
                             | NotifyFilters.FileName
                             | NotifyFilters.LastAccess
                             | NotifyFilters.LastWrite
                             | NotifyFilters.Security
                             | NotifyFilters.Size;

        sourceWatcher.Changed  = OnChanged;
        sourceWatcher.Created  = OnCreated;
        sourceWatcher.Deleted  = OnDeleted;
        sourceWatcher.Renamed  = OnRenamed;
        sourceWatcher.Error  = one rror;

        sourceWatcher.Filter = "*.txt";
        sourceWatcher.IncludeSubdirectories = true;
        sourceWatcher.EnableRaisingEvents = true;

        Console.WriteLine("Press enter to exit.");
        Console.ReadLine();
    }

    private static void OnChanged(object sender, FileSystemEventArgs e)
    {
        if (e.ChangeType != WatcherChangeTypes.Changed)
        {
            return;
        }

        Console.WriteLine($"Changed: {e.FullPath}");
    }

    private static void OnCreated(object sender, FileSystemEventArgs e)
    {
        string value = $"Created: {e.FullPath}";

        string destinationPath = @"C:\Users\artio\Desktop\FASassignment\root\dir2";
        var name = e.Name;
        var fullPath = e.FullPath;
        string destination = Path.Combine(destinationPath, name);
        File.Copy(fullPath, destination,true);

        Console.WriteLine(value);
    }

    private static void OnDeleted(object sender, FileSystemEventArgs e)
    {
        Console.WriteLine($"Deleted: {e.FullPath}");

        var name = e.Name;
        string destinationPath = @"C:\Users\artio\Desktop\FASassignment\root\dir2";
        string destination = Path.Combine(destinationPath, name);
        File.Delete(destination);
    }

    private static void OnRenamed(object sender, RenamedEventArgs e)
    {
        var oldFullPath = e.OldFullPath;
        var fullPath = e?.FullPath;
        Console.WriteLine($"Renamed:");
        Console.WriteLine($"    Old: {e.OldFullPath}");
        Console.WriteLine($"    New: {e.FullPath}");
        string destinationPath = @"C:\Users\artio\Desktop\FASassignment\root\dir2";

        string destination = Path.Combine(destinationPath, fullPath);
        File.Copy(fullPath, destination, true);
        File.Delete(oldFullPath);
    }

    private static void OnError(object sender, ErrorEventArgs e) =>
        PrintException(e.GetException());

    private static void PrintException(Exception? ex)
    {
        if (ex != null)
        {
            Console.WriteLine($"Message: {ex.Message}");
            Console.WriteLine("Stacktrace:");
            Console.WriteLine(ex.StackTrace);
            Console.WriteLine();
            PrintException(ex.InnerException);
        }
    }
}

uj5u.com熱心網友回復：

你的問題是這一行：

string destination = Path.Combine(destinationPath, fullPath);

除錯它，您會發現這并不會導致您的想法。您正在嘗試合并兩個完整路徑。

相反，使用這個：

private void OnRenamed(object sender, RenamedEventArgs e)
{                       
    Console.WriteLine($"Renamed:");
    Console.WriteLine($"    Old: {e.OldFullPath}");
    Console.WriteLine($"    New: {e.FullPath}");

    var oldFileName = Path.GetFileName(e.OldFullPath);
    var newFileName = Path.GetFileName(e.FullPath);
    var oldDestinationPath = Path.Combine(Destination, oldFileName);
    var newDestinationPath = Path.Combine(Destination, newFileName);
    var info = new FileInfo(oldDestinationPath);            
    info.MoveTo(newDestinationPath);
}

注意我沒有使用這個File類。眾所周知，這是有問題的。

另外，我建議使用某種行程日志并重試，以便恢復。否則，這可能會留下很多更改，因為檔案可能會保留它們，這可能會導致您的操作失敗。

更新：

關于您關于其他檔案的其他問題，看起來您正在嘗試在創建它的行程釋放它的句柄之前訪問該檔案，因此您可以嘗試引入一秒或其他東西的小延遲：

private void OnCreated(object sender, FileSystemEventArgs e)
{
    var name = e.Name;
    var fullPath = e.FullPath;
    string destination = Path.Combine(Destination, name);
    Console.WriteLine($"Copy to: {destination}");
    Thread.Sleep(1000); //Intentional delay
    File.Copy(fullPath, destination, true);
    Console.WriteLine("File copied successfully.");
}

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