public static void Test()
{
Console.WriteLine("==============================Command Test==================================");
Receiver receiver = new Receiver();
Command cmd = new ConcreteCommand(receiver);
Invoker invoker = new Invoker(cmd);
invoker.Action();//调用者执行
}
/// <summary>
/// 命令的构造函数，参数表明了构建一个命令必须
/// 同时制定一个命令的接收者，他们的生命收起相同。
/// </summary>
/// <param name="receiver"></param>
public ConcreteCommand(Receiver receiver)
{
this.receiver = receiver;
}
