关于c＃：银行账户’不包含“银行账户”的定义

BankAccount' does not contain a definition for 'BankAccount

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这是银行账户类别：

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namespace BankAccount
{
public abstract class BankAccount
{
protected static int numberOfAccounts = 100001;
private double balance;
private string owner;
private string accountNumber;

public BankAccount()
{
balance = 0;
accountNumber = numberOfAccounts +"";
numberOfAccounts++;
}

public BankAccount(string name, double amount)
{
owner = name;
balance = amount;
accountNumber = numberOfAccounts +"";
numberOfAccounts++;
}

public BankAccount(BankAccount oldAccount, double amount)
{
owner = oldAccount.owner;
balance = amount;
accountNumber = oldAccount.accountNumber;
}
}
}

这是支票账户类：

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namespace BankAccount
{
class CheckingAccount : BankAccount
{
int fee = 15;
public CheckingAccount(string name, double amount)
{
base.BankAccount(name, amount);
}
public new bool Withdraw(double amount)
{
double totalAmount = amount + fee;
return base.Withdraw(totalAmount);
}
}
}

因为，base.BankAccount(name, amount);我出错了，

'BankAccount' does not contain a definition for 'BankAccount.'

银行账户是基础类，支票账户继承基础类。当我删除基本关键字时，它会说：

Non Invokable member cannot be used as a method.

总的来说，我创建了一个对象，我想接受一个main值——一个字符串和一个double，然后将它发送给CheckingAccount类，CheckingAccount构造函数应该运行，然后将值发送给BankAccount构造函数并进行计算。

我怎么修正这个错误

'BankAccount' does not contain a definition for 'BankAccount'

. ？谢谢，