Why My Thread Safe Generic Collection not Respect My Enumerator ?

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I have wrote a a thread safe collection inherited from IList(OF T) and and also wrote an Enumerator Inherited from IEnumerator(Of T), the below code shows the GetEnumerator Method

VB

Public Function GetEnumerator() As IEnumerator(Of T) Implements IEnumerable(Of T).GetEnumerator
    Dim value As IEnumerator(Of T) = CType(Nothing, IEnumerator(Of T))
    SyncLock Me._lock
        ' Why My collection not respect my Enumerator.......??????????????
        value = New RiverNileListEnumerator(Me)

    End SyncLock
    Return value
End Function

During testing the collection, found that it returns No values but when I did replace My-Enumerator with the InnerList (List(Of T) Enumerator the collection will works fine with For Each Statement.

VB

' the collection works fine with this value
          value = Me.InnerList.GetEnumerator()

any advice will be appreciated. Thanks

Posted 22-May-14 17:27pm

a_pess

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phil.o 23-May-14 1:17am

You wrote an article three years ago about implementing an enumerator:

Implementation of IEnumerable(of T) & IEnumerator(Of T) in VB.NET
And now this very basic question about it?
There is something I'm just missing...

1 solution

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a_pess · Accepted Answer · 2014-05-22T17:41:00

Solution 1

I get the answer, i shall use for each statement like this

VB

For Each obj As object In objects.ToArray()
       foo.Items.Add(obj)
   Next

Posted 22-May-14 17:41pm

a_pess