Currency Converter

using System;

class ChangeBuro
{
    static void Main(string[] args)
    {
        double money = double.Parse(Console.ReadLine());
        string currencyIn = Console.ReadLine();
        string currencyOut = Console.ReadLine();
        string currencyStr = currencyIn + currencyOut;

        double usdTobgn = money * 1.79549;
        double eurTobgn = money * 1.95583;
        double gpbTobgn = money * 2.53405;

        switch (currencyStr)
        {
            case "USDBGN":
                Console.WriteLine(Math.Round(usdTobgn, 2) + " " + currencyOut);
                break;
            case "BGNUSD":
                Console.WriteLine(Math.Round(usdTobgn * 1.79549, 2) + " " + currencyOut);
                break;
            case "EURBGN":
                Console.WriteLine(Math.Round(eurTobgn, 2) + " " + currencyOut);
                break;
            case "BGNEUR":
                Console.WriteLine(Math.Round(money / 1.95583, 2) + " " + currencyOut);
                break;
            case "GBPBGN":
                Console.WriteLine(Math.Round(gpbTobgn, 2) + " " + currencyOut);
                break;
            case "BGNGBP":
                Console.WriteLine(Math.Round(gpbTobgn * 2.53405, 2) + " " + currencyOut);
                break;
            case "EURGBP":
                Console.WriteLine(Math.Round(eurTobgn / 2.53405, 2) + " " + currencyOut);
                break;
            case "GBPEUR":
                Console.WriteLine(Math.Round(gpbTobgn / 1.95583, 2) + " " + currencyOut);
                break;
            case "EURUSD":
                Console.WriteLine(Math.Round(eurTobgn / 1.79549, 2) + " " + currencyOut);
                break;
            case "USDEUR":
                Console.WriteLine(Math.Round(usdTobgn / 1.95583, 2) + " " + currencyOut);
                break;
            case "GBPUSD":
                Console.WriteLine(Math.Round(gpbTobgn / 1.79549, 2) + " " + currencyOut);
                break;
            case "USDGBP":
                Console.WriteLine(Math.Round(usdTobgn / 2.53405, 2) + " " + currencyOut);
                break;
        }
    }
}