c# - 从类中调用 double

Question

你好，

我正在尝试从类“钱包”中调用双重支付 但是当我尝试这样做时，它给出了这个错误:

Member'Mc_DOnalds.Program.Paying' cannot be accessed with an instance reference; qualify it with a type name instead.   

这是在钱包类中。

class Wallet
{
    public double WalletCustomer = 100;

    Program Betalen = new Program();
    public void Pay()
    {
        WalletCustomer = (WalletCustomer - Betalen.Paying);            
    }
  }
}

这是在Program.cs中

 public static double Paying = 0;

Answer 1

因为 Paying 是静态的，您不需要创建类的实例来访问该属性。试试这个(看看我如何访问 Program.Paying):

class Wallet
{
    public double WalletCustomer = 100;

    public void Pay()
    {
        WalletCustomer = (WalletCustomer - Program.Paying);            
    }
  }
}