How to delete a selected row in gridview

Question

How to delete a selected row in gridview
pls help here is my .aspx control

<asp:GridView ID="GridView1" runat="server" Width="100%" AutoGenerateColumns="False">            <Columns>                <asp:TemplateField>                    <HeaderTemplate>                        <asp:CheckBox ID="CheckBox1" runat="server" Width="5%" />                        <asp:Label ID="Label1" runat="server" Text="Subject"></asp:Label>                    </HeaderTemplate>                    <ItemTemplate>                        <asp:CheckBox ID="CheckBox2" runat="server" Width="5%" />                        <asp:LinkButton ID="LinkButton1" Text='<%#Eval("md_subject") %>' runat="server" Width="70%">LinkButton</asp:LinkButton>                    </ItemTemplate>                </asp:TemplateField>            </Columns>        </asp:GridView>