Message in Chinese (Simplified) (中文(简体))
属性“<var>Property Name</var>”不得从该属性的 get 方法返回 null。getter 通常应返回 base["<var>X</var>"]。
Unlocalized message
The property '<var>Property Name</var>' must not return null from the property's get method. Typically the getter should return base["<var>X</var>"].
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