取得套用至此参数之指定型别及其衍生型别的自订属性。
Gets the custom attributes of the specified type or its derived types that are applied to this parameter.
型别扩充，可让您轻松扩充现有型别，而不需要额外建立新的衍生型别。
Type extensions, which enable you to extend an existing type easily without the additional overhead work of creating a new derived type.
如果衍生型别覆写了基底型别成员，基底型别成员就不会复制到衍生型别的原型。
If the derived type overrides a base type member, the base type member is not copied to the derived type's prototype.
应用推荐