how to find or check the ancestor element name in xml using linq c#

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C#

XML

LINQ

<tabular>
   <noteGroup xml:id="c1-ntgp-0001">
     <note xml:id="c1-note-0001"><?LABEL a?>It would appear that Europe</note>
    <note xml:id="c1-note-0002"><?LABEL b?>It is also clear</note>
                </noteGroup>
</tabular>

Hai this is xml code, in this xml how to check the ancesior element name


for sample
this if statement check node first child processing instruction or not,
now how to check node ancestor value <tabular> or not in same statement

Using LINQ

current node is <note>

if (node.FirstChild == child && child.NodeType == XmlNodeType.ProcessingInstruction )
{
        return false;
}