相关疑难解决方法(0)

keep()和peek()有什么区别？

MSDN说:

• 保持(): marks the specified key in the dictionary for retention.
• 窥视(): returns an object that contains the element that is associated with the specified key, without marking the key for deletion.

我无法得到真正的不同之处,难道他们都没有为另一个请求保留价值吗？