CurrencyConverter

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

namespace Test
{
    class CurrencyConverter
    {
        static void Main(string[] args)
        {
            decimal BGN = 1.0M;
            decimal USD = 1.79549M;
            decimal EUR = 1.95583M;
            decimal GBP = 2.53405M;
            decimal value = decimal.Parse(Console.ReadLine());
            string inputCurrency = Console.ReadLine();
            string outputCurrency = Console.ReadLine();

            switch(inputCurrency)
            {
                case "BGN":
                    break;
                case "USD":
                    value = ( value * USD );
                    break;
                case "EUR":
                    value = ( value * EUR );
                    break;
                case "GBP":
                    value = ( value * GBP );
                    break;
                default:
                    break;
            }
            switch(outputCurrency)
            {
                case "BGN":
                    value = value / BGN;
                    break;
                case "USD":
                    value = value / USD;
                    break;
                case "EUR":
                    value = value / EUR;
                    break;
                case "GBP":
                    value = value / GBP;
                    break;
                default:
                    break;
            }
            Console.WriteLine("{0:F2} {1}", value, outputCurrency);
        }
    }
}