How to change the value of a read-only IList wrapper around an array in VB.NET

1 Answer

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Module Module1

    Sub Main()

        Dim arr As String() = {"VB.NET", "C", "C++", "PHP", "C#"}

        Dim ilist As IList(Of String) = Array.AsReadOnly(arr)

        arr(1) = "Java"
        Console.WriteLine("arr:")
        PrintIndexAndValues(ilist)
        Console.WriteLine("ilist:")
        PrintIndexAndValues(arr)

    End Sub

    Sub PrintIndexAndValues(arr() As String)
        Dim i As Integer
        For i = 0 To arr.Length - 1
            Console.WriteLine("({0}) : {1}", i, arr(i))
        Next i
    End Sub

    Public Sub PrintIndexAndValues(ilist As IList(Of String))
        Dim i As Integer
        For i = 0 To ilist.Count - 1
            Console.WriteLine("({0}) : {1}", i, ilist(i))
        Next i
    End Sub

End Module

' run:
' 
' arr:
' (0)  VB.NET
' (1) : Java
' (2) : C++
' (3) : PHP
' (4) : C#
' ilist:
' (0)  VB.NET
' (1) : Java
' (2) : C++
' (3) : PHP
' (4) : C#

 



answered Apr 8, 2016 by avibootz

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