<ExtensionAttribute> _
Public Shared Function XPathSelectElements ( _
    node As XNode, _
    expression As String _
) As IEnumerable(Of XElement)

Dim node As XNode
Dim expression As String
Dim returnValue As IEnumerable(Of XElement)

returnValue = node.XPathSelectElements(expression)

public static IEnumerable<XElement> XPathSelectElements(
    this XNode node,
    string expression
)

[ExtensionAttribute]
public:
static IEnumerable<XElement^>^ XPathSelectElements(
    XNode^ node, 
    String^ expression
)

public static function XPathSelectElements(
    node : XNode, 
    expression : String
) : IEnumerable<XElement>

XElement root = new XElement("Root",
    new XElement("Child1", 1),
    new XElement("Child1", 2),
    new XElement("Child1", 3),
    new XElement("Child2", 4),
    new XElement("Child2", 5),
    new XElement("Child2", 6)
);
IEnumerable<XElement> list = root.XPathSelectElements("./Child2");
foreach (XElement el in list)
    Console.WriteLine(el);

Dim root As XElement = _
    <Root>
        <Child1>1</Child1>
        <Child1>2</Child1>
        <Child1>3</Child1>
        <Child2>4</Child2>
        <Child2>5</Child2>
        <Child2>6</Child2>
    </Root>
Dim list As IEnumerable(Of XElement) = root.XPathSelectElements("./Child2")
For Each el As XElement In list
    Console.WriteLine(el)
Next

<Child2>4</Child2>
<Child2>5</Child2>
<Child2>6</Child2>