c# 闭包的相关知识以及需要注意的地方

  class Program
  {
    static Action CreateGreeting(string message)
    {
      return () => { Console.WriteLine("Hello " + message); };
    }

    static void Main()
    {
      Action action = CreateGreeting("DeathArthas");
      action();
    }
  }

void AddControlClickLogger(Control control, string message)
{
	control.Click += delegate
	{
		Console.WriteLine("Control clicked: {0}", message);
	}
}

  class Program
  {
	static List<Action> CreateActions()
    {
      var result = new List<Action>();
      for(int i = 0; i < 5; i++)
      {
        result.Add(() => Console.WriteLine(i));
      }
      return result;
    }

    static void Main()
    {
      var actions = CreateActions();
      for(int i = 0;i<actions.Count;i++)
      {
        actions[i]();
      }
    }
  }

	//其他都保持与之前一致
    static List<Action> CreateActions()
    {
      var result = new List<Action>();
      for (int i = 0; i < 5; i++)
      {
        int temp = i; //添加局部变量
        result.Add(() => Console.WriteLine(temp));
      }
      return result;
    }

	//这样fix也是可以的
    static List<Action> CreateActions()
    {
      var result = new List<Action>();
      foreach (var i in Enumerable.Range(0,5))
      {
        result.Add(() => Console.WriteLine(i));
      }
      return result;
    }