[anis_derna]

لو تكرمت ان تشرح لي هذا الكود و الادوات المستخدمة 

Private Shared Sub __ENCAddToList(ByVal value As Object)
   Dim list As List(Of WeakReference) = Form18.__ENCList
   SyncLock list
       If (Form18.__ENCList.Count = Form18.__ENCList.Capacity) Then
           Dim index As Integer = 0
           Dim num3 As Integer = (Form18.__ENCList.Count - 1)
           Dim i As Integer = 0
           Do While (i <= num3)
               Dim reference As WeakReference = Form18.__ENCList.Item(i)
               If reference.IsAlive Then
                   If (i <> index) Then
                       Form18.__ENCList.Item(index) = Form18.__ENCList.Item(i)
                   End If
                   index += 1
               End If
               i += 1
           Loop
           Form18.__ENCList.RemoveRange(index, (Form18.__ENCList.Count - index))
           Form18.__ENCList.Capacity = Form18.__ENCList.Count
       End If
       Form18.__ENCList.Add(New WeakReference(RuntimeHelpers.GetObjectValue(value)))
   End SyncLock
End Sub