c# 运算符重载 explicit implicit operator

先上代码验证

class Program
    {
        static void Main(string[] args)
        {

            var p1 = new Person {Age = 30};
            var p2 = new Person { Age = 31 };
            Console.WriteLine(p1==p2);//运算符重载   输出false
            //

            Person person = p1.Age;
            Console.WriteLine(person.Age);// 输出30
            var age = (int)p2;
            Console.WriteLine(age);// 输出31
            //
            Console.ReadKey();
        }
    }

    public class Person
    {
        public int Age { set; get; }
        public static bool operator ==(Person p1, Person p2) => p1.Age == p2.Age;
        public static bool operator !=(Person p1, Person p2) => !(p1.Age == p2.Age);
        //此处写 implicit 隐式转换  explicit 显示转换 都可以 显示转换在用的地方进行强制转换
        public static implicit operator Person(int age)
        {
            return new Person {Age = age};
        }
        //
        public static  explicit  operator int(Person person)
        {
            return person.Age;
        }
    }

结论  运算符重载必须是静态方法