名前付きメソッド匿名メソッド依頼をインスタンス化

 




// Declare a delegate

delegate void Del(int i, double j);

class MathClass

{

static void Main()

{

MathClass m = new MathClass();

// Delegate instantiation using "MultiplyNumbers"

Del d = m.MultiplyNumbers;

// Invoke the delegate object.

System.Console.WriteLine("Invoking the delegate using 'MultiplyNumbers':");

for (int i = 1; i <= 5; i++)

{

d(i, 2);

}

}

// Declare the associated method.

void MultiplyNumbers(int m, double n)

{

System.Console.Write(m * n + " ");

}

}

// Declare a delegate

delegate void Printer(string s);

class TestClass

{

static void Main()

{

// Instatiate the delegate type using an anonymous method:

Printer p = delegate(string j)

{

System.Console.WriteLine(j);

};

// Results from the anonymous delegate call:

p("The delegate using the anonymous method is called.");

// The delegate instantiation using a named method "DoWork":

p = new Printer(TestClass.DoWork);

// Results from the old style delegate call:

p("The delegate using the named method is called.");

}

// The method associated with the named delegate:

static void DoWork(string k)

{

System.Console.WriteLine(k);

}

}
 
 


 
   



  
    
The delegate using the anonymous method is called. 


  
    
The delegate using the named method is called.