vb.net – 克隆一个列表(类)

Public Class City
    'here are many fields of type string and integer
    Public Roads As New List(Of Road)
End Class
Public Class Road
    'here are many fields of type string and integer
    Public Hazards As New List(Of Hazard)
End Class
Public Class Hazard
    Implements ICloneable

    'here are many fields of type string and integer and double
    Public Function Clone() As Object Implements System.ICloneable.Clone
        Return Me.MemberwiseClone
    End Function
End Class

所以,假设我有一个我正在研究的城市,有些情况我想要创建,作为基础的一条道路及其危险,然后添加另一条道路,但使用先前的道路危险作为起点然后调整字段.

Dim rd As New Road
'add road fields

dim hz1 as New Hazard
'add hazard fields
dim hz2 as New Hazard
'add hazard fields

'add the hazard objects to the road
rd.Hazards.Add(hz1)
rd.Hazards.Add(hz2)

'add the road to the city
myCity.Roads.Add(rd)


'here I want to start a new road based on the old road
Dim rdNew As New Road

'copy or clone the hazards from old road
rdNew.Hazards = rd.Hazards '<============

'over-write some of the hazard fields
rdNew.Hazards(0).Description = "temp"

所以我知道复制一个类会复制指针而不是内容.我在危险类中使用了ICloneable接口,但不能说我正确使用它. Hazards变量是危险等级列表.我该如何克隆那门课？