vb.net类的属性定义，使用方式

Namespace mySpace
    Public Class MyClass1

        Private Property _myID As String
        Private Property _myName As String
        Private Property Y As Integer
        Public Property X As Integer


        Public Property myID As String
            Get
                Return _myID
            End Get
            Set(value As String)
                _myID = value
            End Set
        End Property
        Public Property myName As String
            Get
                Return _myName
            End Get
            Set(value As String)
                _myName = value
            End Set

        End Property

        Public Property mX As Interger
            Get
               X
            End Get
            Set(value As Inter)
               X=2*Y
            End Set

        End Property

    End Class
End Namespace

注释：这里定义为属性的意义     

1   通过私有属性来访问公有属性，达到安全控制的目的

2  通过私有属性来访问公有属性，还可以在赋值的时候，做一些限制或者特殊的处理，计算。达到对私有属性更高一层的控制。某一个属性的值改变了，自动触发另外一个属性的值。不用在外部通过事件的代码来实现。