Average in Lambda Expressions in C#

using System;
using System.Collections.Generic;
using System.Linq;

namespace NilPointer
{
    class Program
    {
        static void Main(string[] args)
        {
            var numbers = new List<int> {
                50, 2, -7, 11,-9, 26, 6, 42
            };

            var average1 = numbers.Average(number => number);
            Console.WriteLine("Average 1: " + average1);

            var average2 = numbers.Where(number => number > 0).Average(number => number);
            Console.WriteLine("Average 2: " + average2);

            Console.ReadLine();
        }
    }
}

Output

Average 1: 15.125
Average 2: 22.83