tax cal, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
             const int topRateThreshold = 1000000;
    const int higherRateThreshold = 500000;
    const int basicRateThreshold = 250000;

const decimal topRateFactor = 0.30M;
    const decimal higherRateFactor = 0.20M;
    const decimal basicRateFactor = 0.05M;

decimal salaryWorkingRange = 1800000;

decimal taxDue = 0;

if (salaryWorkingRange > topRateThreshold) {
        Console.WriteLine("top Tax "+(salaryWorkingRange - topRateThreshold) * topRateFactor);
        taxDue += (salaryWorkingRange - topRateThreshold) * topRateFactor;
        salaryWorkingRange = topRateThreshold;
        
    }
    if (salaryWorkingRange > higherRateThreshold) {
        Console.WriteLine("middle Tax "+(salaryWorkingRange - higherRateThreshold) * higherRateFactor);
        taxDue += (salaryWorkingRange - higherRateThreshold) * higherRateFactor;
        salaryWorkingRange = higherRateThreshold;
        
    }
    if (salaryWorkingRange > basicRateThreshold) {
        Console.WriteLine("last Tax "+(salaryWorkingRange - basicRateThreshold) * basicRateFactor);
        taxDue += (salaryWorkingRange - basicRateThreshold) * basicRateFactor;
        
    }

Console.WriteLine("Total Tax "+taxDue+"    Tax per month "+taxDue/12);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 14 Mb, average nr of threads: 2