处理类型“<var>Type Name</var>”时发生错误。“<var>X</var>”中声明的类型成员“<var>Member</var>”缺少必需的“<var>Y</var>”属性。如果类层次中的一个类使用显式序列化功能(<var>Y</var>)，则其基类和所有派生类都必须使用该功能。

There was an error processing type '<var>Type Name</var>'. Type member '<var>Member</var>' declared in '<var>X</var>' is missing required '<var>Y</var>' property. If one class in the class hierarchy uses explicit sequencing feature (<var>Y</var>), then its base class and all derived classes have to do the same.

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