Sum of numbers

internal class Program
{
    static void Main(string[] args)
    {
        Random rand = new Random();
        int maxNumber = 101;
        int number = rand.Next(maxNumber);
        int sum = 0;
        int firstDivider = 3;
        int secondDivider = 5;

        for (int i = 0; i <= number; i++)
        {
            if (i % firstDivider == 0 || i % secondDivider == 0)
            {
                sum += i;
            }
        }

        Console.WriteLine($"Сумма чисел кратных {firstDivider} и {secondDivider} = {sum}");
    }
}