HOW TO A CHECKED UNCHECKED ROW on header checkbox and also i have to delete the selected row how i can achieve this

Question

HERE IS MY DESIGN .ASPX 
 
HOW TO DELETE A CHECKED UNCHECKED ROW and also
i have to delete the selected row on delete button how i can achieve this
 
<asp:GridView ID="GridView1" runat="server" Width="100%" AutoGenerateColumns="False">

<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" Width="5%" />
<asp:Label ID="Label1" runat="server" Text="Subject">
</HeaderTemplate>

<asp:CheckBox ID="CheckBox1" runat="server" Width="5%" />
<asp:LinkButton ID="LinkButton1" Text='<%#Eval("md_subject") %>' runat="server" Width="70%">LinkButton


 </asp:GridView>

<asp:Button ID="Button1" runat="server" Text="DELETE" />