public static void Main()
Console.WriteLine("C. Celsius");
Console.WriteLine("F. Farenheit");
Console.Write("Select which temperatute to execute. C for Celsius or F for Farenheit: ");
char ch = char.Parse(Console.ReadLine().ToUpper());
Console.Write("Input the value of F: ");
double F = double.Parse(Console.ReadLine());
double celsius = ((double)5/9) * (F - 32);
Console.WriteLine("Fahrenheit: {0} Celsius: {1}", F, celsius);
Console.Write("Input the value of C: ");
double C = double.Parse(Console.ReadLine());
double fahren = ((double)9/5) * C + 32;
Console.WriteLine("Celsius: {0} Farenheit: {1}", C, fahren);
{ Console.WriteLine("\nWRONG INPUT!\n"); }