類屬性應該從另一個類提供（vb.net）

Question

我正在使用vb.net創建基於Web的應用程序。我嘗試創建簡潔易用的代碼。

我的問題是： 我要創建一個類的屬性，可以有（從另一個類也許）constaint值僅及我想設計者提供aceptable值。

I want to see like in the picture

例如： 我應該在下面的代碼改變？

Public Class users 
    private _gender as byte 
    public writeonly property Gender as byte 
    set(value as byte) 
     _gender = value 
    End set 
    End property 
End Class 

Public Class genders 
    Public ReadOnly Property Female As Byte 
     Get 
      Return 0 
     End Get 
    End Property 
    Public ReadOnly Property Male As Byte 
     Get 
      Return 1 
     End Get 
    End Property 
End Class 

Answer 1

使用Enum

Public Enum Genders As Byte 
    Female = 0 
    Male = 1 
End Enum 

或者Const或Shared類的屬性，如果你需要一些其他的類型，那麼整數

Public Class SomeTypes 
    Public Const TypeOne As String = "One" 
    Public Const TypeTwo As String = "Two" 

    Public Shared ReadOnly Property TypeThree As String = "Three" 

End Class