通常，应始终在实现Dispose .aspx rel = nofollow> IDisposable 。 DirectoryEntry 和 DirectorySearcher 均实现 IDisposable 。在您的代码示例中，仅第一个 DirectoryEntry 对象被处置。您还需要为 mySearcher 和 directoryObject 添加using块：

As a general rule you should always call Dispose on types that implement IDisposable. Both DirectoryEntry and DirectorySearcher implement IDisposable. In your code example only the first DirectoryEntry object gets disposed. You need to add a using block for mySearcher and directoryObject as well:

Using entry As DirectoryEntry = New DirectoryEntry(connectionPrefix)
    Using mySearcher = New DirectorySearcher(entry)
        '...'
        Using directoryObject = result.GetDirectoryEntry()
            '...'
        End Using
    End Using
End Using

您实际上可以通过不使用 GetDirectoryEntry 来减轻服务器的负载，而直接从服务器中检索 distinguishedName以以下方式搜索结果（此代码未经测试，因为我当前不在域中）：

You may actually lighten the load on your server a bit by not using GetDirectoryEntry and instead retrieve "distinguishedName" directly from the search result in the folling way (this code is untested as I am not currently on a domain):

mySearcher.PropertiesToLoad.Add("distinguishedName");
result = mySearcher.FindOne()
'...'
distinguishedName = result.Properties("distinguishedName")(0)