Message in Chinese (Simplified) (中文(简体))
最常见的原因有: (a)在未引发相应事件的情况下更改了集合或集合的计数，(b)引发的事件使用了错误的索引或项参数。
Unlocalized message
The most common causes are (a) changing the collection or its Count without raising a corresponding event, and (b) raising an event with an incorrect index or item parameter.
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