无法从双精度转换为十进制错误

对于此分配，我需要对BankAccount程序进行一些处理，但首先需要复制运行示例的get。我已经完全按照下面的屏幕快照所示从工作分配表中复制了代码，但是出现以下错误。

Error   2   Argument 1: cannot convert from 'double' to 'decimal' Line 13 Column 51
Error   1   The best overloaded method match for 'BankAccount.BankAccount.BankAccount(decimal)' has some invalid arguments Line 13 Column 35    
Error   4   Argument 1: cannot convert from 'double' to 'decimal' Line 13 Column 30 
Error   3   The best overloaded method match for 'BankAccount.BankAccount.Withdraw(decimal)' has some invalid arguments Line 18 Column 13   

我不知道是什么原因导致了这些错误，因为我不认为我曾经使用过两次，而且很快对这些错误的Google都没有帮助。

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

namespace BankAccount
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create Bank Account & Print Balance
            BankAccount account = new BankAccount(142.50);
            Console.WriteLine("Account Balance is: " + account.ToString());

            // Withdraw £30.25
            Console.WriteLine("Withdrawing £30.25");
            account.Withdraw(30.25);

            // Print balance again
            Console.WriteLine("Account Balance is: " + account.ToString());
        }
    }

。

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

namespace BankAccount
{
   public class BankAccount
    {
       private decimal _balance;

       public decimal Balance
       {
           get { return _balance; }
           private set { _balance = value; }
       }

       //Constructor: Constructs a new Bank Account with 0 balance
       public BankAccount()
       {
           Balance = 0;
       }

       //Constructor: Constructs a new Bank Account with the specified balance
       public BankAccount(decimal balance)
       {
           Balance = balance;
       }

       //Deposits the specified amount into the Bank Account
       public void Deposit(decimal amount)
       {
           Balance += amount;
       }

       //Withdraws the specified amount from the Bank Account
       public void Withdraw(decimal amount)
       {
           Balance -= amount;
       }

       //ToString Override
       public override string ToString()
       {
           return string.Format("{0}: Balance = {1}", "BankAccount", Balance);

       }
    }
}