using System.Collections;
using System.Collections.Generic;
public static void Main()
IList<Student> studentList = new List<Student>(){
new Student(){id = 1, name = "John", age = 13},
new Student(){id = 2, name = "Moin", age = 21},
new Student(){id = 3, name = "Bill", age = 18},
new Student(){id = 4, name = "Ram", age = 20},
new Student(){id = 5, name = "Ron", age = 15},
Console.WriteLine("Avg.");
var avgAge = studentList.Average(s=> s.age);
Console.WriteLine(avgAge);
private string _studentName;