03. Sum Prime Non Prime

using System;

namespace SumPrimeNonPrime
{
    class Program
    {
        static void Main(string[] args)
        {
            double prime = 0;
            double nonPrime = 0;
            string num = Console.ReadLine();

            while (num != "stop")
            {
                double number = double.Parse(num);

                if (number >= 0)
                {

                    if (number % 2 == 0 || number % 3 == 0 || number % 5 == 0)
                    {
                        if (number == 2 || number == 3 || number == 5 || number == 7)
                        {
                            prime += number;
                        }
                        else
                        {
                            nonPrime += number;
                        }
                    }
                    else
                    {
                        prime += number;

                    }
                }
                else
                {
                    Console.WriteLine("Number is negative.");
                }
                num = Console.ReadLine();
            }
            Console.WriteLine($"Sum of all prime numbers is: {prime}");
            Console.WriteLine($"Sum of all non prime numbers is: {nonPrime}");
        }
    }
}