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";
//    }
//}
}