通过执行以下操作首先获取客户节点:

Get the customer node first by doing the following:

$customersNode = $doc.ChildNodes | ? { $_.name -eq "customers" }

现在您可以使用文档 A、B 和 C 在 $customersNode 上调用 AppendChild.

Now you can call AppendChild on $customersNode with document A, B and C.

然而，导入文档 A、B 和 C，您几乎是正确的.使用 DocumentElement 属性，如下所示:

However to import document A, B and C you almost had it right. Use the DocumentElement property like below:

$docAImported = $doc.ImportNode($docA.DocumentElement, $true)