Save info to an XML doc.

SaveToXML.cs

var xDoc = new XmlDocument();
        var declarationNode = xDoc.CreateXmlDeclaration("1.0", "", "");
        xDoc.AppendChild(declarationNode);
        var comment = xDoc.CreateComment(string.Format("This file contains information about {0} - {1}", BookName, BookName));
        xDoc.AppendChild(comment);
var docRoot = xDoc.CreateElement("Books");
XmlNode ndBookISBN = xDoc.CreateElement("BookISBNCode"),
    ndBookName = xDoc.CreateElement("BookName"),
    ndAuthorName = xDoc.CreateElement("AuthorName"),
    ndReleaseDate = xDoc.CreateElement("ReleaseDate");
ndBookISBN.InnerText = BookISBNCode;
ndBookName.InnerText = BookName;
ndAuthorName.InnerText = AuthorName;
ndReleaseDate.InnerText = ReleaseDate;
docRoot.AppendChild(ndBookISBN);
docRoot.AppendChild(ndBookName);
docRoot.AppendChild(ndAuthorName);
docRoot.AppendChild(ndReleaseDate);
xDoc.AppendChild(docRoot);
try
{
    AppGlobal.CreateDirectory(dirPath);
    xDoc.Save(XMLFilePath);
    return true;
}
catch (Exception e)
{
    throw new Exception(string.Format("Unable to save info on {0} to file.{1}Message:{2}.", BookName, Environment.NewLine, e.Message), e);
}