如何在VB.NET中复制对象类型?

Private Sub AddTableRow(ByRef originalTable As System.Web.UI.WebControls.Table)

        Dim originalRow As System.Web.UI.WebControls.TableRow = originalTable.Rows(1)
        Dim insertingRow As New System.Web.UI.WebControls.TableRow
        Dim insertingCells(originalRow.Cells.Count) As System.Web.UI.WebControls.TableCell
        Dim index As Integer = 0

        For Each cell As System.Web.UI.WebControls.TableCell In originalRow.Cells

            insertingCells(index) = New System.Web.UI.WebControls.TableCell
            insertingCells(index).Controls.Add(cell.Controls.Item(0))

            index += 1
        Next

        insertingRow.Cells.AddRange(insertingCells)

        originalTable.Rows.Add(insertingRow)

    End Sub

但我在倒数第二行得到一个空引用异常,

insertingRow.Cells.AddRange(插入单元格)

…我不知道为什么。是因为每个单元格的内容没有用新对象初始化吗?如果是的话,我该怎么办?

编辑:

For Each cell As System.Web.UI.WebControls.TableCell In originalRow.Cells
        Dim addedContent As New Object
        Dim underlyingType As Type = cell.Controls.Item(0).GetType

        addedContent = Convert.ChangeType(cell.Controls.Item(0), underlyingType)
        insertingCells(index) = New System.Web.UI.WebControls.TableCell
        insertingCells(index).Controls.Add(addedContent)

        index += 1
Next

通过使用调试器,我看到这个策略正在工作——但是额外的表行仍然没有出现……当我静态地执行此操作时,仍然会出现。