/// <summary>
/// Per ogni valore riscontrato tramite l'xPath costruisce un dizionario con l'xpath specifico come chiave e il valore dell'xpath valutato come valore
/// Es: {"//books/book[1]/authors/author[1]", "Antonio"},{"//books/book[1]/authors/author[2]", "Erasmo"},{"//books/book[1]/authors/author[3]", "Renata"}, ecc...
/// </summary>
/// <typeparam name="TType">Tipo di valore da salvare nel dizionario come valore</typeparam>
/// <param name="nav">Navigator da valutare</param>
/// <param name="xPath">Espressione XPath Generica Es. //books/book/authors/author</param>
/// <returns>Dizionario xPath esplicito, valore</returns>
public static IDictionary <string, TType> GetValuesFromXPathDictionary <TType>(this XPathNavigator nav, string xPath)
{
IDictionary <string, TType> dictionary = new Dictionary <string, TType>();
XPathExpression expr = nav.Compile(xPath);
XPathNodeIterator iterator = nav.Select(expr);
while (iterator.MoveNext())
{
XPathNavigator currentNavigator = iterator.Current.Clone();
var currentXPath = currentNavigator.GetFullXPath();
var currentValue = String.IsNullOrEmpty(currentNavigator.InnerXml) ? currentNavigator.OuterXml : nav.InnerXml;
dictionary.Add(currentXPath, currentValue.GetValue <TType>());
}
return(dictionary);
}