Collection was of a fixed size

Private Sub XamMenuItem_DeleteClick(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Dim开发者_运维百科 selectedRowCount As Integer = Grid.SelectionSettings.SelectedRows.Count
        If (Grid.Rows.Count >= selectedRowCount) Then
            While Grid.SelectionSettings.SelectedRows.Count > 0
                Dim index As Integer = Grid.SelectionSettings.SelectedRows(0).Index
                If index >= 0 Then
                    DeleteRow(index)
                End If
            End While
        End If
    End Sub

Private Sub DeleteRow(ByVal rowNumber As Integer)
        If Grid.Rows.Count > 0 Then
            Grid.Rows(rowNumber).Delete() --->**NotSupportedException: Collection was of a fixed size.**
        End If
End Sub

Please help the above code throws me a "Collection was of a fixed size". Would appreciate you help.

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I'm assuming that you're using XtraGrid or at least something from DevExpress. According to their forums:

Rows can be added/deleted in the XtraGrid using the AddNewRow and DeleteRow methods only if the bound data source supports the IBindingList interface and implements the corresponding methods of the interface. You can refer to the GridIBindingList tutorial for an example.

What datasource are you using? An array?