Unbinding from a DataGridView, memory leak?

[Andy_P]

This is my entire test project. One form, one DataGridView and three buttons:

I have also tried binding to a list of Integers in case something odd was occurring with my custom class.

Private myList As BindingList(Of TrackedSet)
 
Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs)
 
    If (myList Is Nothing) Then
        myList = New BindingList(Of TrackedSet)
    End If
 
    ' Binding here needs two GC's to reclaim memory when unbinding
    ' dgv.DataSource = myList
 
    Dim i As Integer
    For i = 0 To 50000
        myList.Add(New TrackedSet(i, "00000000001,123,abc"))
    Next i
 
    ' Binding here allows memory to be reclaimed ok when unbinding
    dgv.DataSource = myList
 
End Sub
 
Private Sub button2_Click(ByVal sender As Object, ByVal e As EventArgs)
 
    dgv.DataSource = Nothing
    myList.Clear
    myList = Nothing
 
End Sub
 
Private Sub button3_Click(ByVal sender As Object, ByVal e As EventArgs)
 
    GC.Collect
 
End Sub