Array mapping using LINQ

 namespace ConsoleApplication1  
 {  
   public class Student  
   {  
     public string FirstName;  
     public string LastName;  
   }  
   public class StudentFullName  
   {  
     public string FullName;  
     public StudentFullName(Student student)  
     {  
       FullName = student.FirstName + " " + student.LastName;  
     }  
     public override string ToString()  
     {  
       return FullName;  
     }  
   }  
   class Program  
   {  
     static void Main(string[] args)  
     {  
       Student s1 = new Student { FirstName = "Jack", LastName = "Frost" };  
       Student s2 = new Student { FirstName = "Mary", LastName = "Wong" };  
       Student s3 = new Student { FirstName = "Ronald", LastName = "McDonalds" };  
       Student s4 = new Student { FirstName = "John", LastName = "Smith" };  
       List<Student> studentArray = new List<Student>() { s1, s2, s3, s4 };  
       List<StudentFullName> fullNameArray = studentArray.Select(a => new StudentFullName(a)).ToList();  
       string nameList = fullNameArray.OrderBy(m => m.FullName).Select(m => m.FullName).Aggregate((current, next) => current + ", " + next);  
       Console.WriteLine(nameList);  
       Console.ReadLine();  
     }  
   }  
 }