I\'ve found a lot of articles about how to get node content by using simple XPath expression and C#, for example:
XPath:
/bookstore/author/first-nam
You can use Linq to XML as well to get value of specified element
var list = XDocument.Parse("xml string").Descendants("ParaLine") .Select(x => x.Element("string").Value).ToList();
From above query you will get value of all the string element which are inside ParaLine tag.