C# 无效令牌'；（'；在类、结构或接口成员声明中）

每次打开和关闭括号后，我都会得到无效的标记。

我怀疑您直接在类中编写了此代码；指令只能出现在方法中，不能直接出现在类中：

        usersIncome = InputOutput.DisplayTaxDue(double userIncome, double taxDue, double taxRate, double flatRate);
        Console.WriteLine(" Your income is : {0:C} ", usersIncome );
        Console.WriteLine(" Your tax due is : {0:C} ", taxDue);    
        Console.WriteLine(" Your income is : {0} ", taxRate );
        Console.WriteLine(" Flat Rate is : {0} ",  flatRate);

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另外，在调用方法时，不指定参数的类型；它们已在声明中指定。

在将参数传递到

displaytasdue（）之前，不需要类型名称

。例如，

double userIncome，

是无效语法。传递参数时，您没有重新指定类型。您是在方法中编写此代码，还是直接在类中编写此代码？

class YourClass
{
    public void YourMethod()
    {
        usersIncome = InputOutput.DisplayTaxDue(userIncome, taxDue, taxRate, flatRate);
        Console.WriteLine(" Your income is : {0:C} ", usersIncome );
        Console.WriteLine(" Your tax due is : {0:C} ", taxDue);    
        Console.WriteLine(" Your income is : {0} ", taxRate );
        Console.WriteLine(" Flat Rate is : {0} ",  flatRate);
    }
}