How to repeat code after invalid data is entered

Question

I have an assignment to calculate the *parkingFee*, I'm having a hard time figuring out how to get this code to repeat after a invalid number (greater than 24 or less than 1) has been entered. 

 

The parking fee in a parking station is calculated on whole number of hours multiplied by the hourly rate of $2.50. A program is required to input and validate the hours to be between 1-24 inclusive. Calculate the parking fee given there is a maximum parking fee of $20.00. Output the hours parked and the parking fee (formatted to 2 decimal places)."

Below you'll find the code that I'm having trouble with. Any help would be greatly appreciated. 

namespace _3PRB_Assignment_Part_1
{
    class Program
    {
        static void Main(string[] args)
        {
           /* Ryley Copeman
            * 29/08/2018
            * Assignment parkingFee2*/

            /* PSEUDOCODE */
            /* HOURLY_RATE=2.5
             * INPUT parkTime
             * parkFee = HOURLY_RATE * hours
             * OUTPUT parkFee */


                decimal parkTime;  // input - time in hour eg 1.5 for 1 and a half hours
                const decimal HOURLY_RATE = 2.50m; // HOURLY_RATE * INPUT parkTime = parkFee
                const decimal MAX_FEE = 20.00m; // MAX_FEE is set as a payment cap and ignores any extra charges incurred over 8 hours
                decimal parkFee;
                Console.WriteLine("ParkingFee1 program developed by: Ryley Copeman");
                Console.WriteLine("Please enter your total time parked in hours: Eg 1.5 or 3.0");
                parkTime = decimal.Parse(Console.ReadLine());

                if (parkTime > 8)
                {
                    Console.Write("Total fee is $" + MAX_FEE);
                }
                else
                {
                    parkFee = Math.Ceiling(parkTime) * HOURLY_RATE;
                    Console.Write("Parking Fee = $" + parkFee);
                }
                while(parkTime < 0 || parkTime > 24)  // validate...
                //while (parkTime <= 0) )
                {
                Console.WriteLine("Error – Park Time out of range");
                Console.WriteLine("Enter - Park Time between 0 and 24 (HOURS):");
                parkTime = int.Parse(Console.ReadLine());

            }

            }
        }
    }