【Project Euler】1 第一题

//If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
//Find the sum of all the multiples of 3 or 5 below 1000.

 static void Main()
        {
            int sum=0;
            for(int i=0;i<1000;i++)
            {
                if (i % 3 == 0 || i % 5 == 0)
                {
                    sum = sum + i;
                }
            }
            Console.WriteLine(sum);
        }