一个简单的例子错误查找

Question

 class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("请输入您的名字：");
            string s = Console.ReadLine();
            GreetPeople(s);
        }
        public void GreetPeople(string s)
        {
            EnglishGreet(s);
        }
        public void EnglishGreet(string s)
        {
            Console.WriteLine("Morning"+ s);
            Console.ReadLine();
        }
    }其中 GreetPeople(s);
这个说对像引用
怎么改？谢谢

Answer 1

 class Program 
    { 
        static void Main(string[] args) 
        { 
            Console.WriteLine("请输入您的名字："); 
            string s = Console.ReadLine(); 
            GreetPeople(s); 
        } 
        public static void GreetPeople(string s) 
        { 
            EnglishGreet(s); 
        } 
        public static void EnglishGreet(string s) 
        { 
            Console.WriteLine("Morning"+ s); 
            Console.ReadLine(); 
        } 
    } 

Answer 2

class Program 
    { 
        static void Main(string[] args) 
        { 
            Console.WriteLine("请输入您的名字："); 
Program p=new Program ();
            string s = Console.ReadLine(); 
            p.GreetPeople(s); 
        } 
        public void GreetPeople(string s) 
        { 
            EnglishGreet(s); 
        } 
        public void EnglishGreet(string s) 
        { 
            Console.WriteLine("Morning"+ s); 
            Console.ReadLine(); 
        } 
    } 

Answer 3

class Program 
    { 
        static void Main(string[] args) 
        { 
            Console.WriteLine("请输入您的名字："); 
            string s = Console.ReadLine(); 
            GreetPeople(s); 
        } 
        public static void GreetPeople(string s) 
        { 
            EnglishGreet(s); 
        } 
        public static void EnglishGreet(string s) 
        { 
            Console.WriteLine("Morning"+ s); 
            Console.ReadLine(); 
        } 
    }