[C#] Numeral Systems/ Task - AllTypes

using System;
class AnyOtherNumSys
{
    //Binary to decimal
    static void BinToDec()
    {
        Console.WriteLine("Enter your binary number:");
        string value = Console.ReadLine();
        int num = Convert.ToInt32(value, 2);
        Console.WriteLine("Binary {0} converted to dec {1}.", value, num.ToString());
    }

    //Binary to hexadecimal
    static void BinToHex()
    {
        Console.WriteLine("Enter your binary number:");
        string num = Console.ReadLine();
        int decNum = Convert.ToInt32(num, 2);
        string decInHex = decNum.ToString("x");
        Console.WriteLine("Hexadecimal representation: {0}", decInHex);
    }
    //hexadecimal to decimal
    static void HexToDec()
    {
        Console.WriteLine("Enter your hexadecimal number:");
        string value = Console.ReadLine();
        int num = Convert.ToInt32(value, 16);
        Console.WriteLine("Hex 0x{0} converted to dec {1}.", value, num.ToString());
    }
    //hexadecimal to binary
    static void HexToBin()
    {
        Console.WriteLine("Enter your hexadecimal number:");
        string temp = Console.ReadLine();
        int num = Convert.ToInt32(temp, 16);
        string dec = Convert.ToString(num, 2);
        Console.WriteLine("Binary representation {0} ", dec);
    }
    //decimal to binary
    static void DecToBin()
    {
        Console.WriteLine("Enter your decimal number:");
        int dec = int.Parse(Console.ReadLine());
        Console.WriteLine("Binary representation {0} ",Convert.ToString(dec, 2));
    }
    //decimal to hexadecimal
    static void DecToHex()
    {
        Console.WriteLine("Enter your decimal number:");
        int dec = int.Parse(Console.ReadLine());
        string decInHex = dec.ToString("x");
        Console.WriteLine("Hexadecimal representation "+ decInHex);
    }
    //choises
    static void Choise(string choise, string changeTo)
    {
        switch (choise)
        {
            case "1":
                if (changeTo == "3")
                {

                    Console.WriteLine("Convert to decimal");
                    BinToDec();
                }
                if (changeTo == "2")
                {
                    Console.WriteLine("Convert to hexadecimal");
                    BinToHex();
                }
                break;
            case "2":
                if (changeTo == "3")
                {
                    Console.WriteLine("Convert to decimal");
                    HexToDec();
                }
                if (changeTo == "1")
                {
                    Console.WriteLine("Convert to binary");
                    HexToBin();
                }
                break;
            case "3":
                if (changeTo == "1")
                {
                    Console.WriteLine("Convert to binary");
                    DecToBin();
                }
                if (changeTo == "2")
                {
                    Console.WriteLine("Convert to hexadecimal");
                    DecToHex();
                }
                break;
            default:
                Console.WriteLine("Wrong Choise!");
                Main();
                break;
        }
    }
    static void Main()
    {
        Console.WriteLine("Choose a numeral system:\r\n1.Binary\r\n2. Hexadecimal\r\n3. Decimal");
        string makeChoise = Console.ReadLine();
        Console.Write("Convert to: ");
        string changeTo = Console.ReadLine();
        Choise(makeChoise, changeTo);
        Console.WriteLine();
        Main();
    }
}