using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // Student collection

        IList<Student> studentList = new List<Student>() { 

            new Student() { StudentID = 1, StudentName = "John", Age = 18, StandardID = 1 } ,

                new Student() { StudentID = 2, StudentName = "Steve",  Age = 21, StandardID = 1 } ,

                new Student() { StudentID = 3, StudentName = "Bill",  Age = 18, StandardID = 2 } ,

                new Student() { StudentID = 4, StudentName = "Ram" , Age = 20, StandardID = 2 } ,

                new Student() { StudentID = 5, StudentName = "Ron" , Age = 21 } 

        };

        var studentNames = studentList.Where(s => s.Age > 18)

                              .Select(s => s)

                              .Where(st => st.StandardID > 0)

                              .Select(s => s.StudentName);

​

        foreach(var name in studentNames){          

            Console.WriteLine(name);

        }

    }

}

​

public class Student{

​

    public int StudentID { get; set; }

    public string StudentName { get; set; }

    public int Age { get; set; }

    public int StandardID { get; set; }     

}

​