Property parameters-valid property parameter types

Attribute Class location parameters and named parameters are limited to the following types:
* Bool, byte, Char, double, float, Int, long, short, string
* System. Type
* Object
* The Enum type, provided that it and any type of nested Enum are publicly accessible.
* Contains any one-dimensional array of the above types.
Because the parameter types are limited to the types listed in this list, you cannot pass data structures such as classes into the attribute constructors. This restriction makes sense because attributes are attached at design time and there are no instances (objects) of the class ). The values of valid types in this list can be hard-coded at design time, which is why these types are used.