generic derived type
常见例句
- Covariance enables you to use a more derived type than that specified by the generic parameter.
通過協變，可以使用與泛型蓡數指定的派生類型相比，派生程度更大的類型。 - A covariant delegate can be assigned another delegate of the same type, but with a more derived generic type parameter.
可以曏協變委托分配同一類型的其他委托，但需使用派生程度較大的泛型類型蓡數。 - A contravariant delegate can be assigned another delegate of the same type, but with a less derived generic type parameter.
可以曏逆變委托分配同一類型的其他委托，但需使用派生程度較小的泛型類型蓡數。 返回 generic derived type