C commissioned use cases

 C# Use of delegation

using System;

namespace WeiTuo
{
    class Program
    {
        //  Delegate with one parameter   And no return value of the delegate  
        public delegate void SayUpdate(string name);
        
        static void Main(string[] args)
        {
           

            //  Statement of delegation    How to use delegation    Interpretation of entrustment   Pass the method as a variable , And execute in the form of method . 
            // 



            SayUpdate dlg = SayHi;
            dlg += SayBye;
            dlg -= SayBye;

            dlg(" voice , How do you do ");

            //  Anonymous functions  

            Console.ReadLine();


        }


        public static void SayHi(string name)
        {
            Console.WriteLine($"{ name}, How do you do   Speech technology ");
        }

        public static void SayBye(string name)
        {
            Console.WriteLine($"{ name}, bye ");
        }


    }
}

  effect