使用扩展方法(this 扩展类型)

namespace ConsoleApp_UseExtendWays
{
    class Program
    {
        static void Main(string[] args)
        {
            Student s = new Student();
            Console.WriteLine(s.GetSexString());
            Console.WriteLine(s.GetAge()); 
            Console.ReadKey();
        }
    }
    public static class StudentExtension
    {
        public static string GetSexString(this Student argStudent)//扩展方法 this 扩展类型 
        {
            return argStudent.GetSex() == true ? "男" : "女";
        }

        public static int GetAge(this Student ss)
        {
            return ss.Age;
        }
    }
    public class Student
    {
        public bool GetSex()
        {
            return false;
        }

        public int Age = 12;
    }

    //public static class StudentConverter
    //{
    //    public static string GetSexString(Student argStudent)
    //    {
    //        return argStudent.GetSex() == true ? "男" : "女";
    //    }
    //}
}