在asp.net 2.0中，如果在一個masterpage頁面中，使用服務端的table控件的話，如下所示，會在設置視圖時，沒了其中的contentplaceholder，

    <asp:Table ID="tbl" runat="server">
            <asp:TableRow>
                <asp:TableCell>
                    This is my header!
                </asp:TableCell>
            </asp:TableRow>
            <asp:TableRow>
                <asp:TableCell>
                    <asp:contentplaceholder id="_content" runat="server">
                    </asp:contentplaceholder>           
                </asp:TableCell>
            </asp:TableRow>
            <asp:TableRow>
                <asp:TableCell>
                    This is my footer!
                </asp:TableCell>
            </asp:TableRow>
        </asp:Table>  

   而如果用普通的頁面table的話，則不會出現如下的問題，
  <table>
            <tr>
                <td>
                    This is my header!
                </td>
            </tr>
            <tr>
                <td>
                    <asp:contentplaceholder id="_content" runat="server">
                    </asp:contentplaceholder>           
                </td>
            </tr>
            <tr>
                <td>
                    This is my footer!
                </td>
            </tr>
        </table>
  微軟已經確認是個小BUG拉，將會在下一個版本解決，具體參考：
http://lab.msdn.microsoft.com/PRoductfeedback/viewfeedback.aspx?feedbackid=6345496f-76eb-4e6c-aa95-791bfbfc24a0

出處：jackyrong BLOG