Message in Chinese (Simplified) (中文(简体))
属于对象键一部分的属性值与 ObjectContext 中存储的对应属性值不匹配。如果属于键一部分的属性返回不一致或错误的值，或如果对属于键一部分的属性作出更改后未调用 DetectChanges，可能就会发生此情况。
Unlocalized message
The value of a property that is part of an object's key does not match the corresponding property value stored in the ObjectContext. This can occur if properties that are part of the key return inconsistent or incorrect values or if DetectChanges is not called after changes are made to a property that is part of the key.
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