[Jumpstart C#] loops demo - sum 1...N

using System;

class Sum
{
    static void Main()
    {
        Console.Write("n = ");
        int n = Int32.Parse(Console.ReadLine());
        int number = 1;
        int sum = 1;
        Console.Write("The sum 1");

        while (number < n)
        {
            number++;
            sum += number;
            Console.Write("+{0}", number);
        }

        Console.WriteLine(" = {0}", sum);
    }
}