using System;

using System.Linq;

using System.Xml.Linq;

​

public class Program

{

    public static void Main()

    {

        const string xml =

            @"<CPU> 

<NEW type=""DOS"" model=""SV112"">dos-8875</NEW> 

<NEW type=""DIN"" model=""SV544"">din-9984</NEW> 

<NEW type=""FTP"" model=""SV774"">ftp-9952</NEW> 

<NEW type=""DOS"" model=""SV112"">dos-8854</NEW> 

</CPU>";

​

        var doc = XDocument.Parse(xml);

​

        foreach (var element in doc.Descendants("NEW"))

        {

            element.ReplaceAttributes(

                element.Attributes().Select(MapAttribute));

        }

        Console.WriteLine(doc);

    }

​

    private static XAttribute MapAttribute(XAttribute attribute)

    {

        switch (attribute.Name.LocalName)

        {

            case "type":

                return new XAttribute("name", attribute.Value);

            case "model":

                return new XAttribute("model-no", attribute.Value);

            default:

                return attribute;

        }

    }

}

​