[C#] Delegate語法

//Step1. 宣告Delegate物件
public delegate void MyDelegate(ref string output, string name);


//Step 2.根據MyDelegate規格建立方法
private static void SayHello(ref string output, string name)
{
output += String.Format("Hello, {0}. ", name);
}

private static void GoodMorning(ref string output, string name)
{
output += String.Format("Good Morning, {0}. ", name);
}

//Step3. 宣告MyDelegate變數

MyDelegate handler;

///Step4. 將方法位置參考加入handler委派物件
handler += new MyDelegate(SayHello);
handler += new MyDelegate( GoodMorning );

//Step5. 透過handler委派物件觸發方法執行
string data = "";

if (handler != null)
{
handler.Invoke(ref data, "JB");
}

結果 :
Hello, JB. Good Morning, JB.