深入理解C#委托delegate的使用_C#教程

public delegate void FirstDelegate ();

FirstDelegate firstDelegate=new FirstDelegate(Test.First);

public class Test
{
 
     public static void First()
     {
         Console.WriteLine("第一次实现静态方法类的委托");
     }
}

firstDelegate();

FirstDelegate firstDelegate=new FirstDelegate(new Test().First);

public class Test
{
 
     public  void First()
     {
         Console.WriteLine("第一次实现实例化方法类的委托");
     }
}

firstDelegate();

public class problem
{
     public delegate void BuyDelegate();
 
 
     static void mian()
     {
         BuyDelegate buyDelegate=new BuyDelegate(Buy.BuyFood);
         buyDelegate+=Buy.BuyCake;
         buyDelegate+=Buy.BuyTea;
 
         buyDelegate();
     }
}
 
public class Buy
{
    public void BuyFood()
    {
      Conssole.WriyeLine("买个螺狮粉");
    }
    public void BuyCake()
     {
      Conssole.WriyeLine("买个蛋糕");
 
    }
    public void BuyTea()
    {
       Conssole.WriyeLine("买杯奶茶");
    }
 
  
}

public class program
{
    public delegate void BuyFruit(double price,double count)
 
    static void main(string[] arg)
    {
 
        BuyFurit buyFruit=delegate
        {
           Console.WriteLine("水果总价为"+price*count);
        };
        buyFruit(3,5);
    }
 
}