Fejl i compile

Hvad er det lige den prøver at fortælle mig der er galt.. ? Vs hvad skal jeg ændre :) ? thx

Error    1    The best overloaded method match for 'System.Console.WriteLine(bool)' has some invalid arguments   

Error    2    Argument '1': cannot convert from 'method group' to 'bool'

Error    3    The best overloaded method match for 'System.Console.WriteLine(bool)' has some invalid arguments   

Error    4    Argument '1': cannot convert from 'method group' to 'bool'   

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using System;
using System.Collections.Generic;
using System.Text;

namespace CashRegister
{
    class CashRegister
    {
   

        public CashRegister()
        {
            purchase = 0;
            payment = 0;
        }
        public void recordPurchase(double amount)
        {
            purchase = purchase + amount;
        }
        public void enterPayment(int dollars, int quarters, int dimes, int nickels, int pennies)
        {
            payment = dollars + quarters + QUARTER_VALUE + dimes * DIME_VALUE + nickels * NICKEL_VALUE + pennies * PENNY_VALUE;
        }
        public double giveChange()
        {
            double change = payment - purchase;
            purchase = 0;
            payment = 0;
            return change;
        }
        public static readonly double QUARTER_VALUE = 0.25;
        public static readonly double DIME_VALUE = 0.1;
        private static readonly double NICKEL_VALUE = 0.05;
        private static readonly double PENNY_VALUE = 0.01;

        private double purchase;
        private double payment;

    }


   
}



---------------------

using System;
using System.Collections.Generic;
using System.Text;

namespace CashRegister
{
    public class Program
    {
        public static void Main(string[] args)       
            {
                CashRegister register = new CashRegister();

                register.recordPurchase(0.75);
                register.recordPurchase(1.5);
                register.enterPayment(2, 0, 5, 0, 0);
                Console.WriteLine("Change = ");
                Console.WriteLine(register.giveChange);

                register.recordPurchase(2.25);
                register.recordPurchase(19.25);
                register.enterPayment(23, 2, 0, 0 , 0);
                Console.WriteLine("Change =");
                Console.WriteLine(register.giveChange);
            }               
       
    }
}