Hyperlink with more than one parameter Or Error: Server tag not well Formed with Hyperlink

Hi *.*,
In my first day of .net i found this error the with the help of my senior i resolved it.Then i didn't know why it come so.2day my junior faced same issue i gone through and got why it come :).its all because when binding hyperlink with data not at just data, you have to give entire NavigateUrl the Server control. and also ' (single quote) and " (Double quote) have to be in correct way too...

Code :

<asp:DataGrid ID="DGrid" runat="server" AutoGenerateColumns="False">

                <Columns>

                    <asp:TemplateColumn HeaderText="Sample Column">

                        <ItemTemplate>

                            <asp:HyperLink runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "UserName").ToString()%>'

                                NavigateUrl='<%# "page1.aspx?id=" + DataBinder.Eval(Container.DataItem,"Id").ToString() + "&Name=" + DataBinder.Eval(Container.DataItem,"UserName").ToString()%>'

                                ID="Hyperlink1" NAME="Hyperlink1" />

                        </ItemTemplate>

                    </asp:TemplateColumn>

                </Columns>

            </asp:DataGrid>

If u had any trouble just ask, Happy to help u :) 
Stay Tune... 
Have a nice day... 'N happy Coding :)