How do I define a list of properties

I hav开发者_StackOverflow中文版e a class called "heater". One of the properties is "designstatus", a string. I want to limit the property to one of three choices; "current", "obsolete", "notdesigned". How would I do this?

---

You can use an Enum. E.g.:

Public Enum DesignStatus
    Current
    Obsolete
    NotDesigned
End Enum

---

You can do this using an Enum, but as an Enum is an Integer this isn't going to completely do what you want, so I would suggest doing something similar to this:

Public Enum DesignStatuses
   Current
   Obsolete
   NotDesigned
End Enum

So when you need to get the actual String name of the Enum that you have used you can do:

DesignStatus.ToString("G")

Which will return the actual name of the constant instead of the value.