For Each loop through a Collection

 
Imports System
Imports System.Collections

Public Class MainClass
    
    Shared Sub Main(ByVal args As String())
        Dim people As New Collection
        people.Add(New Employee("A"))
        people.Add(New Customer("B"))

        ' Works.
        For Each person As Object In people
            Console.WriteLine(person.Name)
        Next person
    End Sub

End Class



Public Class Employee
    Public Name As String

    Public Sub New(ByVal new_name As String)
        Name = new_name
    End Sub

    Public Overridable Function IsManager() As Boolean
        Return False
    End Function
End Class
Public Class Customer
    Public Name As String

    Public Sub New(ByVal new_name As String)
        Name = new_name
    End Sub
End Class
Public Class Manager
    Inherits Employee

    Public Sub New(ByVal new_name As String)
        MyBase.new(new_name)
    End Sub
    Public Overrides Function IsManager() As Boolean
        Return True
    End Function
End Class

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For Each loop through a Collection : Collection « Data Structure « VB.Net

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