C# 创建 委托事件（数据事件）类库并引用

程序集如下

using System;

namespace ClassLibrary1
{
    public class Class1
    {
        public delegate void ChangeDelegate(UInt16 value);
        public event ChangeDelegate changeEvent;
        private UInt16 _num;
        public UInt16 Num {
            get { return _num; }
            set {
                if (_num != value)
                    changeEvent(value);
                _num = value;
            }
        }
    }
}

using ClassLibrary1;
using System;

namespace ConsoleApp2 {

    class Program {

        static void Main(string[] args) {
            Class1 class1 = new Class1();
            class1.changeEvent += Class1_changeEvent;
            class1.Num = 1;
            Console.ReadKey();
        }

        private static void Class1_changeEvent(ushort value) {
            Console.WriteLine($"Num数值({value})发生了改变");
        }
    }
}

运行结果