这个问题花了我很多时间才解决.首先，错误信息看起来像一个笑话.其次，没有别的了，只有那个消息.

This question took me a lot of time to solve. First of all, the error message looks like a joke. Second, there is nothing more, just that message.

无论如何，我设法通过以下方式修复它:

Anyway, I managed to fix it by:

1. 确保 userDn 包含整个路径(例如，"LDAP://server-address/CN=" + userDn + ",OU=optional,DC=your-domain,DC=com".这实际上非常重要，如果您不提供完整路径，它将抛出一个HRESULT 异常:0x80005000>.

1. Making sure that userDn contains the whole path (e.g., "LDAP://server-address/CN=" + userDn + ",OU=optional,DC=your-domain,DC=com". This is actually very important, if you don't supply the full path it will throw an Exception from HRESULT: 0x80005000.

替换 dirEntry.Properties["member"].Add(userDn); 由 entry.Invoke("Add", new object[] { userDn });

然后我想删除一个用户，我希望 entry.Invoke("Remove", new object[] { userDn }); 工作.然而，这个邪恶的广告只有在你使用小写remove"时才有效，所以 entry.Invoke("remove", new object[] { userDn }); 有效对我来说.

Then I wanted to remove a user and I expected entry.Invoke("Remove", new object[] { userDn }); to work. However, this devilish AD will only work if you use lower case "remove", so entry.Invoke("remove", new object[] { userDn }); worked for me.