How to create groups and sort the groups in c#.net

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace sorted_with_Groups

{

    class Program

    {

        public class Student

        {

            public string First { get; set; }

        }

        public static List<Student> GetStudents()

        {

            List<Student> students = new List<Student>

        {

           new Student {First="adi"},

           new Student {First="balu"},

           new Student {First="reddy"},

           new Student {First="nani"},

           new Student {First="pavan"},

           new Student {First="raghu"},

           new Student {First="ramu"},

           new Student {First="raja"},

           new Student {First="vamsi"},

           new Student {First="cm"},

           new Student {First="pm"},

           new Student {First="hm"},

           new Student {First="sm"}

        };

            return students;

        }

        static void Main(string[] args)

        {

            List<Student> students = GetStudents();

            var sortedGroups =

                from student in students

                orderby student.First

                group student by student.First[0] into newGroup

                orderby newGroup.Key

                select newGroup;

            Console.WriteLine(Environment.NewLine + "sortedGroups:");

            Console.WriteLine("*************************");

            foreach (var studentGroup in sortedGroups)

            {

                Console.WriteLine(studentGroup.Key);

                Console.WriteLine("----------------");

                foreach (var student in studentGroup)

                {

                    Console.WriteLine("{0}", student.First);

                }

                Console.WriteLine("----------------");

            }

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

            Console.ReadKey();

        }

    }

}

OUTPUT