C# 当目录存在时，ZipFile.ExtractToDirectory是否引发异常？

根据，如果要提取zip文件的目标目录已经存在，则程序应该抛出一个

IOException

。此外，“备注”部分说，“目标目录不能已经存在。”

即使

输出作为目录存在，也可以正常工作（无异常）。差不多

ZipFile.ExtractToDirectory("archive.zip", "\\");

也可以毫无例外地工作。所以，我试图理解为什么在微软文档明确建议应该有例外的情况下，没有例外

注意：我正在运行.NET 5。
看起来像是文档错误。我为此打开了两个GitHub版本，这是从它们创建的

.NETCore是开源的，这意味着我们可以检查实际的源代码以了解发生了什么

实际调用该方法：

如果目标目录存在，则不会引发In-IOException，即使文档站点这样说：

/// <exception cref="IOException">An archive entry?s name is zero-length, contains only whitespace, or contains one or more invalid
/// characters as defined by InvalidPathChars. -or- Extracting an archive entry would have resulted in a destination
/// file that is outside destinationDirectoryName (for example, if the entry name contains parent directory accessors).
/// -or- An archive entry has the same name as an already extracted entry from the same archive.</exception>
public static void ExtractToDirectory(this ZipArchive source, string destinationDirectoryName, bool overwriteFiles)
{
    if (source == null)
        throw new ArgumentNullException(nameof(source));

    if (destinationDirectoryName == null)
        throw new ArgumentNullException(nameof(destinationDirectoryName));

    foreach (ZipArchiveEntry entry in source.Entries)
    {
        entry.ExtractRelativeToDirectory(destinationDirectoryName, overwriteFiles);
    }
}

重点是：

//请注意，即使存在destinationDirectoryName，这也将为我们提供良好的DirectoryInfo

@PranavHosangadi根据微软文档，应该有一个例外，所以是的，我在问为什么没有一个例外。@zaggler这两个是分开的examples@PranavHosangadiOP询问的是文件夹，而不是文件。你的小提琴实际上证明了OP的观点。如果在第一个
提取之前创建
mytest
，则代码仍然works@PanagiotisKanavos你说得对。问题是：OP的问题是可重复的。（FWIW，VTC不可复制不是我的）我怀疑这样的事情。谢谢你的检查。那么，如果这真的是一个文档错误，有没有办法向Microsoft报告呢？你可以做得更好，@bjorn93，应该有一个可以自己单击并编辑它的窗口。@HereticMonkey这只在Github上打开文件，不允许你实际编辑它。不过，这是一个打开问题的好地方。我已经知道了
public static void ExtractToDirectory(string sourceArchiveFileName, string destinationDirectoryName, Encoding? entryNameEncoding, bool overwriteFiles)
{
    if (sourceArchiveFileName == null)
        throw new ArgumentNullException(nameof(sourceArchiveFileName));

    using (ZipArchive archive = Open(sourceArchiveFileName, ZipArchiveMode.Read, entryNameEncoding))
    {
        archive.ExtractToDirectory(destinationDirectoryName, overwriteFiles);
    }
}

/// <exception cref="IOException">An archive entry?s name is zero-length, contains only whitespace, or contains one or more invalid
/// characters as defined by InvalidPathChars. -or- Extracting an archive entry would have resulted in a destination
/// file that is outside destinationDirectoryName (for example, if the entry name contains parent directory accessors).
/// -or- An archive entry has the same name as an already extracted entry from the same archive.</exception>
public static void ExtractToDirectory(this ZipArchive source, string destinationDirectoryName, bool overwriteFiles)
{
    if (source == null)
        throw new ArgumentNullException(nameof(source));

    if (destinationDirectoryName == null)
        throw new ArgumentNullException(nameof(destinationDirectoryName));

    foreach (ZipArchiveEntry entry in source.Entries)
    {
        entry.ExtractRelativeToDirectory(destinationDirectoryName, overwriteFiles);
    }
}

internal static void ExtractRelativeToDirectory(this ZipArchiveEntry source, string destinationDirectoryName, bool overwrite)
{
    if (source == null)
        throw new ArgumentNullException(nameof(source));

    if (destinationDirectoryName == null)
        throw new ArgumentNullException(nameof(destinationDirectoryName));

    // Note that this will give us a good DirectoryInfo even if destinationDirectoryName exists:
    DirectoryInfo di = Directory.CreateDirectory(destinationDirectoryName);
      ...