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 2163.

Program.cs

using System;

namespace KaggleConsoleApplication
{
	class Program
  {
    static void Main(string[] args)
    {
      int total=0;

      for (int i = 0; i < 2163; i++)
      {
        var isDivBy3 = i % 3 == 0;
        var isDivBy5 = i % 5 == 0;

        if (isDivBy3 || isDivBy5)
        {
          total += i;
        }

      }
      Console.WriteLine($"Total:{total}");
    }
  }
}