Average values from Enumerable.Range in CSharp

using System;/*from   www. j  a  v  a  2s.  co m*/
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        IEnumerable<int> intSequence = Enumerable.Range(1, 10);
        foreach (int i in intSequence)
            Console.WriteLine(i);
        double average = intSequence.Average();
        Console.WriteLine("Here is the average:  {0}", average);
    }
}