void Start()
{
DMInvoker invoker = new DMInvoker();
ConcreteCommand1 cmd1 = new ConcreteCommand1(new DMReceiver1());
invoker.AddCommand(cmd1);
invoker.AddCommand(cmd1);
invoker.ExecuteCommand();
}
void Start()
{
DMInvoker invoker = new DMInvoker();
DMReceiver1 receiver1 = new DMReceiver1();
ConcreateCommand1 command = new ConcreateCommand1(receiver1);
invoker.AddCommand(command);
invoker.InvokeCommand();
}