# 创建一个新的XmlDocument对象
$xmlDoc = New-Object System.Xml.XmlDocument
<h1>创建XML声明（可选）</h1><p>$xmlDeclaration = $xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", $null)
$xmlDoc.AppendChild($xmlDeclaration) | Out-Null</p><h1>创建根节点</h1><p>$root = $xmlDoc.CreateElement("Configuration")
$xmlDoc.AppendChild($root) | Out-Null</p><h1>添加子节点</h1><p>$child = $xmlDoc.CreateElement("Setting")
$child.SetAttribute("Name", "Timeout")
$child.InnerText = "30"
$root.AppendChild($child) | Out-Null</p><h1>保存到文件</h1><p>$xmlDoc.S*e("C:\temp\config.xml")</p>

<?xml version="1.0" encoding="UTF-8"?><Configuration><Setting Name="Timeout">30</Setting></Configuration>

# 加载现有XML文件
$xmlDoc = New-Object System.Xml.XmlDocument
$xmlDoc.Load("C:\temp\config.xml")
<h1>查找节点并修改值</h1><p>$node = $xmlDoc.SelectSingleNode("//Setting[@Name='Timeout']")
if ($node) {
$node.InnerText = "60"
}</p><h1>添加新节点</h1><p>$newNode = $xmlDoc.CreateElement("Setting")
$newNode.SetAttribute("Name", "LogLevel")
$newNode.InnerText = "Info"
$xmlDoc.Configuration.AppendChild($newNode) | Out-Null</p><h1>保存更改</h1><p>$xmlDoc.S*e("C:\temp\config.xml")</p>

$nodes = $xmlDoc.SelectNodes("//Setting")
foreach ($n in $nodes) {
    Write-Host "Name: $($n.Name), Value: $($n.InnerText)"
}

[xml]$xml = @"
<?xml version="1.0"?>
<Users>
  <User Id="1" Name="Alice" />
  <User Id="2" Name="Bob" />
</Users>
"@
<h1>修改第一个用户的名称</h1><p>$xml.Users.User[0].Name = "Alicia"</p><h1>保存</h1><p>$xml.S*e("C:\temp\users.xml")</p>