Find the sum of all natural numbers which are multiples of 3 and 5 below 1000. (C#)

Question

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.

Solution

static void Main()
{
//List all numbers below 100 which are multiples of 3 or 5
List Multiples = new List();
for (int i=0; i<1000 i="" int="">
{
if (i%3 ==0) || (i%5==0)
{
Multiples.Add(i);
}
}
Console.Write (Multiple.Sum());
Console.ReadKey();