how to Select XML by attribute value in c#

<Platform-info>
<Parent pid=0>
<folder id='' name/>
<folder id='' name/>
</Parent>
<Parent pid=2>
<folder id='' name/>
<folder id='' name/>
</Parent>
</Platform-info>
in above xml how i can select he parent node which id =2...?

Ans -

XmlDocument xml = new XmlDocument();
xml.LoadXml(str); // suppose that str string contains "<Parent>...</Parent>"

XmlNodeList xnList = xml.SelectNodes("/Platform-info/Parent[@pid='2']");
foreach (XmlNode xn in xnList)
{
Console.WriteLine(xn.InnerText);
}