How to read XML Nodes in XML using c#.net

Use XmlReader (fastest but forward only), XDocument (LINQ to XML) or XmlDocument. See the examples in the msdn documentation.

Using LINQ to XML:

using System.Xml.Linq;

var doc = XDocument.Parse(xml); // or XDocument.Load()
var elements = from e in doc.Descendants("answer")
               where e.Attribute("status").Value == "attempt"
               select e;

// elements will be IEnumerable<XElement>

Use XmlDocument and XPath:

XmlDocument document = new XmlDocument();
//here you should load your xml for example with document.Load();
XmlNodeList nodes = document.SelectNodes("/report/question/answer[@status = 'correct']/radioButton");

Just modify the XPath to your needs.

try this one..

foreach (XmlNode xnode in xdoc.SelectNodes("report/question/answer"))
    {
        if (xnode.Attributes.GetNamedItem("status").Value == "correct")
        {
            string value = xdoc.SelectSingleNode("report/question/answer[@status='correct']/radioButton").Attributes.GetNamedItem("id").Value;

        }
        if (xnode.Attributes.GetNamedItem("status").Value == "attempt")
        {
            string value = xdoc.SelectSingleNode("report/question/answer[@status='attempt']/radioButton").Attributes.GetNamedItem("id").Value;
        }
    }