C# 关键字explicit（显示），implicit（隐式），类型的隐式和显式转换

  class Program
    {
        static void Main(string[] args)
        {
            Adaptee ada = new Adaptee();
            Target tar = ada;
        }
    }

    public class Adaptee
    {
        public int code = 1;
    }
    public class Target
    {
        private int data;
        public Target(int data)
        {
            this.data = data;
        }
        //可以进行隐式转换
        public static implicit  operator Target (Adaptee ada)
        {
            return new Target(ada.code);
        }
    }

  class Program
    {
        static void Main(string[] args)
        {
            Adaptee ada = new Adaptee();
            Target tar = (Target)ada;
        }
    }

    public class Adaptee
    {
        public int code = 1;
    }
    public class Target
    {
        private int data;
        public Target(int data)
        {
            this.data = data;
        }
        //必须显示转换
        public static explicit  operator Target (Adaptee ada)
        {
            return new Target(ada.code);
        }
    }