selectSingleNode是做什么用的

XMLNode.SelectSingleNode 方法
获取一个 Microsoft.Office.Interop.Word.XMLNode 对象，该对象表示 Microsoft.Office.Tools.Word.XMLNode 控件中与 XPath 参数匹配的第一个子节点。

命名空间: Microsoft.Office.Tools.Word
程序集: Microsoft.Office.Tools.Word（在 microsoft.office.tools.word.dll 中）

语法
Visual Basic（声明）
Public Function SelectSingleNode ( _
XPath As String, _
<OptionalAttribute> Optional PrefixMapping As String = "", _
<OptionalAttribute> Optional FastSearchSkippingTextNodes As Boolean = True _
) As XMLNode

Visual Basic (用法)
Dim instance As XMLNode
Dim XPath As String
Dim PrefixMapping As String
Dim FastSearchSkippingTextNodes As Boolean
Dim returnValue As XMLNode

returnValue = instance.SelectSingleNode(XPath, PrefixMapping, FastSearchSkippingTextNodes)

C#
public XMLNode SelectSingleNode (
string XPath,
[OptionalAttribute] string PrefixMapping,