魏英杰
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Covariance and Contravariance inference in C# 4.0
When we define our interfaces in C# 4.0, we are allowed to mark each of the generic parameters as in or out. If we try to set a generic parameter as out and that\'d lead to a problem, the compiler rai[详细]
2022-12-28 18:12 分类：问答
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