無效令牌「（」類，結構或接口成員聲明

Question

 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); 

我每天都打開和關閉括號後收到無效令牌

Answer 1

我懷疑你直接寫了這個代碼的類內;指令只能出現在一個方法，而不是直接在類：

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); 
    } 
} 

此外，當你調用一個方法，你不指定參數類型，他們在聲明中已指定