Standard operators

class XMLTransform

{

    static void Main()

    {

        // Create the data source by using a collection initializer.

        // The Student class was defined previously in this topic.

        List<Student> students = new List<Student>()

        {

            new Student {First="Svetlana", Last="Omelchenko", ID=111, 

Scores = new List<int>{97, 92, 81, 60}},

            new Student {First="Claire", Last="O’Donnell", ID=112, 

Scores = new List<int>{75, 84, 91, 39}},

            new Student {First="Sven", Last="Mortensen", ID=113, 

Scores = new List<int>{88, 94, 65, 91}},

        };

        // Create the query.

        var studentsToXML = new XElement("Root",

            from student in students

            let scores = string.Join(",", student.Scores)

            select new XElement("student",

                       new XElement("First", student.First),

                       new XElement("Last", student.Last),

                       new XElement("Scores", scores)

                    ) // end "student"

                ); // end "Root"

        // Execute the query.

        Console.WriteLine(studentsToXML);

        // Keep the console open in debug mode.

        Console.WriteLine("Press any key to exit.");

        Console.ReadKey();

    }

}