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本文转自:http://www.cnblogs.com/rr163/p/4047404.htmlC#的协变和逆变由子类向父类方向转变是协变,用out关键字标识,由父类向子类方向转变是逆变,用in关键字协变和逆变的应用一、 数组的协变Animal[] animalArray = new Dog[]{}... 阅读全文
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public int Compare(Product first, Product second) { return PartialComparer.RefernceCompare(first, second) ?? PartialComparer.Comare... 阅读全文