Bonus Score

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;

namespace ConsoleApplication28
{
    class Program
    {
        static void Main(string[] args)
        {
            var num = int.Parse(Console.ReadLine());
            double bonusScore = 0;
            if (num <= 100)
            {
                bonusScore = 5;
            }
            else if (num > 100&&num<=1000)
            {
                bonusScore = num * 0.20;
            }
            else if (num > 1000)
            {
                bonusScore = num * 0.10;
            }
            if (num % 2 == 0)
            {
                bonusScore += 1;
            }
            else if (num % 10 == 5)
            {
                bonusScore += 2;
            }
            Console.WriteLine("Bonus score: {0}", bonusScore);
            Console.WriteLine("Total score: {0}", num + bonusScore);
        }
    }
}