Currency Converter

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

namespace Currency_Converter_12
{
    class Program
    {
        static void Main(string[] args)
        {
            var currencyValue = double.Parse(Console.ReadLine());
            var currencyInName = Console.ReadLine();
            var currencyOutName = Console.ReadLine();

            byte indexIn = 0;
            byte indexOut = 0;
            string[] currencyName = {"BGN", "USD", "EUR", "GBP"};
            double[] currencyRate = { 1d, 1.79549d, 1.95583d, 2.53405 };

            for (byte i = 0; i < currencyName.Length; i++)
            {
                if (currencyInName == currencyName[i]) indexIn = i;
                if (currencyOutName == currencyName[i]) indexOut = i;
            }
            var currencyOut = currencyValue * currencyRate[indexIn] /
                currencyRate[indexOut];

            Console.WriteLine("Currency value result = {0}",
                                Math.Round(currencyOut, 2));
        }
    }
}