How to map an object to an existing XML file in C# .NET?

You can use serialization to achieve (1) and (2)

[Serializable]
    public class Cd
    {

        public string Title { get; set; }

        public string Artist { get; set; }       
        public string Country { get; set; }

        public string Company { get; set; }

        public string Price { get; set; }

        public string Year { get; set; }
    }

now in order to create an xml from an object use:

    public static string SerializeObject<T>(this T obj)
    {
        var ms = new MemoryStream();
        var xs = new XmlSerializer(obj.GetType());
        var xmlTextWriter = new XmlTextWriter(ms, Encoding.UTF8);
        xs.Serialize(xmlTextWriter, obj);
        string serializedObject = new UTF8Encoding().GetString((((MemoryStream)xmlTextWriter.BaseStream).ToArray()));
        return serializedObject;

    }

in order to create an object from XML use:

public static T DeserializeObject<T>(this string xml)
    {
        if (xml == null)
            throw new ArgumentNullException("xml");
        var xs = new XmlSerializer(typeof(T));
        var ms = new MemoryStream(new UTF8Encoding().GetBytes(xml));
        try
        {
            new XmlTextWriter(ms, Encoding.UTF8);
            return (T)xs.Deserialize(ms);
        }
        catch
        {
            return default(T);
        }
        finally
        {
            ms.Close();
        }
    }

I would create class:

class catalog
{
    public CD cd {get;set;}
}

Here is serialization and deserealization helper:

public class Xml
{
    public static string Serialize<T>(T value) where T : class
    {
        if (value == null)
        {
            return string.Empty;
        }
        var xmlSerializer = new XmlSerializer(typeof(T));
        var stringWriter = new StringWriter();
        using (var xmlWriter = XmlWriter.Create(stringWriter))
        {
            xmlSerializer.Serialize(xmlWriter, value);
            return stringWriter.ToString();
        }
    }

    public static T Deserialize<T>(string xml)
    {
        var serializer = new XmlSerializer(typeof(T));
        T result;

        using (TextReader reader = new StringReader(xml))
        {
            result = (T) serializer.Deserialize(reader);
        }

        return result;
    }
}

Simply call:

catalog catalogObject = Xml.Deserialize<catalog>(xmlCatalogString);

I suspect you also will need to put some attributes on properties like XmlElement(ElementName = "title") because it is case sensitive.

MSDN