我正在尝试创建一个菜单，该菜单将首先以用户身份出现，如果他或她是客户或经理（或退出该程序）。用户选择了客户或经理后，将出现另一个子菜单，其中包含可在客户或经理下执行的操作。出现两个相同的错误，分别针对两行不同的代码指出“名称空间不能直接包含诸如字段或方法之类的成员”。我已经看了几个小时，只是被困住并寻找解决方案。

class Program
{
    static void Main(string[] args)
    {
        Mainmenu();
        Console.ReadKey();

    }
    static void Mainmenu()
    {
        int userChoice = MainmenuChoice(); // Reading in the userChoice with the MenuChoice method

        if (userChoice == 3) // if user enters 3,the program ends
        {
            Console.WriteLine("Thank you,Goodbye!");
        }

        while (userChoice != 3)
        {
            if (userChoice == 1)
            {
                Console.WriteLine("Welcome to the customer menu!\n"); // The customer menu is brought up if user enters 1
                CustomerMenu();
            }
            if (userChoice == 2)
            {
                Console.WriteLine("Welcome to the manager menu!\n"); // The manager menu is brought up if user enters 2
                //ManagerMenu();
            }
            userChoice = MainmenuChoice(); // program ends
            if (userChoice == 3)
            {
                Console.WriteLine("Thank you for visiting VideoMart at University Boulevard,Goodbye!");

            }
        }

    }
    static int MainmenuChoice()
    {
        Console.WriteLine("-----------------------------------------------------------------------------------------------------------"); // introducing the user with the menu 
        Console.WriteLine("Welcome to VideoMart at University Boulevard!  \nAt VideoMart you are able to rent a variety of movies from many genres such as action,family,horror,etc!");
        Console.WriteLine("\nPress 1 if you are a customer");
        Console.WriteLine("\nPress 2 if you are a manager");
        Console.WriteLine("\nPress 3 to Exit");
        Console.WriteLine("-----------------------------------------------------------------------------------------------------------");

        string choice = Console.ReadLine();
        Console.WriteLine();

        while (!(choice == "1" || choice == "2" || choice == "3")) // error checking
        {
            Console.WriteLine("Please try again");
            Console.WriteLine("Press 1 if you are a customer");
            Console.WriteLine("Press 2 if you are a manager");
            Console.WriteLine("Press 3 to Exit");

            choice = Console.ReadLine();
        }

        return int.Parse(choice);
    }

    }
 static void CustomerMenu() {

        int customerChoice = CustomerMenuChoice(); // Reading in the customerChoice into the CustomerMenuChoice method

        if (customerChoice == 5) // if user enters 5,the program ends
        {
            Console.WriteLine("Thank you for using VideoMart,goodbye.");
        }

        while (customerChoice != 5)
        {
            if (customerChoice == 1)
            {
                Console.WriteLine("Press 1 to view movies available to rent.\n"); // this option gives the user the opportunity to view all movies available to rent
                 //MoviesAvailable();
            }
            if (customerChoice == 2)
            {
                Console.WriteLine("Press 2 to rent a movie.\n"); // this option gives the user the opportunity to rent a movie,with email address
                //RentMovie();
            }
            if (customerChoice == 3)
            {
                Console.WriteLine("Press 3 to view a list of movies you currently have rented.\n"); // this option gives the user the opportunity to view movies a user currently has rented,with email address
                //RentMovie();
            }
            if (customerChoice == 4)
            {
                Console.WriteLine("Press 4 to return a movie rented.\n"); // this option gives the user the opportunity to return a movie rented
                //RentMovie();
            }
            customerChoice = CustomerMenuChoice();
            if (customerChoice == 5)
            {
                Console.WriteLine("Thank you for visiting VideoMart at University Boulevard,Goodbye!");

            }
        }            
}
    static int CustomerMenuChoice()
    {
        Console.WriteLine("-----------------------------------------------------------------------------------------------------------"); // Menu for the customer option
        Console.WriteLine("Welcome to VideoMart at University Boulevard!  \nBelow is a list of actions that can be performed by customers!");
        Console.WriteLine("\nPress 1 to view movies available to rent.");
        Console.WriteLine("\nPress 2 to rent a movie.");
        Console.WriteLine("\nPress 3 to view a list of movies you currently have rented.");
        Console.WriteLine("\nPress 4 to return a movie rented.");
        Console.WriteLine("\nPress 5 to exit.");
        Console.WriteLine("-----------------------------------------------------------------------------------------------------------");

        string customerChoice2 = Console.ReadLine();
        Console.WriteLine();

        while (!(customerChoice2 == "1" || customerChoice2 == "2" || customerChoice2 == "3" || customerChoice2 == "4") || customerChoice2 == "5") // error checking
        {
        Console.WriteLine("\nPress 1 to view movies available to rent.");
        Console.WriteLine("\nPress 2 to rent a movie.");
        Console.WriteLine("\nPress 3 to view a list of movies you currently have rented.");
        Console.WriteLine("\nPress 4 to return a movie rented.");
        Console.WriteLine("\nPress 5 to exit.");

            customerChoice2 = Console.ReadLine();
        }

        return int.Parse(customerChoice2);
    }
}