委托

自定义：

class MathOperations

{

　　

public static double Multiplybytwo(double value)
{
  return value*2;      
}
public static double Square(double value)
{
  return value * value;  
}

}

delegate void test(double test1)

class Program

{

static void Main()

{

　　test[] operations={MathOperations.Multiplaybytwo,MathOperations.Square};

for(int i=0;i<operations.Length;i++)

{

ProcessAnddiaplayNumber(operations[i],99);

}

}

static void ProcessAnddisplaynumber(test action,double value)

{double result=action(value);}

}

//Action<T>无返回 类型,Fun<>T，需要返回类型

Func<double ,doubel> operation={Mathoperations.Multioplauybytewo,Mathoperations.square};

static void ProcessAnddisplaynumber(Func<double ,doubel> action,double value)

{double result=action(value);}

}