Den ständige amerikanen i bastun

cel = FahrToCels(fahrTemp);

using System;

namespace ConsoleApp12
{
    class Program
    {
        static public double FahrToCels(int fahr)
        {
            double cel = (fahr - 32) * 5 / 9;
            return cel; 
        }
        static void Main(string[] args)
        {
            double cel;
            Console.Write("How hot do you want the sauna? ");
            do
            {
            Console.WriteLine(" ");
            double fahrTemp = double.Parse(Console.ReadLine());
            cel = FahrToCels(fahrTemp);
                if (cel > 77)
                {
                    Console.WriteLine("It is too hot! You need to lower... Try again!");
                }
                else if (cel < 73)
                {
                    Console.WriteLine("It is to cool, you need more heat! Try again!");
                }
                else if (cel == 75)
                {
                    Console.WriteLine("This is perfect heat for this sauna! Step in!");
                }
                else
                {
                    Console.WriteLine("It's not perfect, but acceptable. OK to step in, but try again if you want even more perfe!");
                }
            }
            while (cel > 73 || cel < 77);
            Console.ReadKey(); 
        }
    }
}

public static double FahrToCels(int fahr)
//Typomvandla fahr till flyttal
//Gör uträkning med decimaler i svaret
return temp

        static public double FahrToCels(int fahr)
        {
            double cel = (fahr - 32) * 5 / 9;
            return cel; 
        }
        static void Main(string[] args)
        {
            double cel;
            Console.Write("How hot do you want the sauna? ");
            do
            {
            Console.WriteLine(" ");
                int fahrTemp = int.Parse(Console.ReadLine());
                cel = FahrToCels(fahrTemp);

        static public double FahrToCels(int fahr)
        {
            double cel = (fahr - 32) * 5 / 9;
            return cel; 
        }
        static void Main(string[] args)
        {
            double cel;
            Console.Write("How hot do you want the sauna? ");
            do
            {
            Console.WriteLine(" ");
                int fahrTemp = int.Parse(Console.ReadLine());
                double fahrD = Convert.ToDouble(fahrTemp);
                cel = FahrToCels(fahrD);

using System;

namespace ConsoleApp12
{
    class Program
    {
        static public double FahrToCels(int fahr)
        {
	        double fahrD;
            fahrD = (double)fahr;
            double cel = (fahrD - 32) * 5 / 9;
            return cel;
        }
        static void Main(string[] args)
        {
            double cel;
            Console.WriteLine("How hot do you want the sauna? ");
            do
            {
                int fahrTemp = int.Parse(Console.ReadLine());
                cel = FahrToCels(fahrTemp);
                cel = Math.Round(cel, 2);
                try
                {
                    fahrTemp = int.Parse(Console.ReadLine());
                    cel = FahrToCels(fahrTemp);
                }
                catch (Exception)
                {
                    Console.WriteLine("Please enter a number!");
                }
                if (cel > 77)
                {
                    Console.WriteLine("You chose " + fahrTemp + " and that is " + cel + " degrees Celcius. It is too hot! You need to lower... Try again!");
                }
                else if (cel < 73)
                {
                    Console.WriteLine("You chose " + fahrTemp + " and that is " + cel + " degrees Celcius. It is to cool, you need more heat! Try again!");
                }
                else if (cel == 75)
                {
                    Console.WriteLine("You chose " + fahrTemp + " and that is " + cel + " degrees Celcius. This is perfect heat for this sauna! Step in!");
                }
                else
                {
                    Console.WriteLine("You chose " + fahrTemp + " and that is " + cel + " degrees Celcius. It's not perfect, but acceptable.\nOK to step in, but try again if you want even more perfect!");
                }
            }
            while (cel != 167);
            Console.ReadKey();
        }
    }
}

                cel = FahrToCels(fahrTemp);
                cel = Math.Round(cel, 2);

            double cel;
            Console.WriteLine("How hot do you want the sauna? ");
            do
            {
                string fahrString = Console.ReadLine();
                int fahrTemp = int.Parse(fahrString);
                cel = FahrToCels(fahrTemp);
                cel = Math.Round(cel, 2);
                try
                {
                    fahrTemp = int.Parse(fahrString);
                }
                catch (Exception)
                {
                    Console.WriteLine("Please enter a number!");
                }