Project Euler – Problem 2

using System;

namespace Problem2
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            int n1,n2,n3,total;

            n1=1;
            n2=2;
            n3=n1+n2;
            total=2;

            while (n3<4000000)
            {
                if (n3%2==0) total+=n3;

                n1=n2;
                n2=n3;
                n3=n1+n2;
            }

            Console.WriteLine ("Sum of even valued terms is {0}",total);
        }
    }
}