How to Create n number of gridview

here i use 7 gridview 
<asp:GridView ID="Gr" runat="server"></asp:GridView> <asp:GridView ID="GridView9" runat="server"></asp:GridView> <asp:GridView ID="GridView10" runat="server"></asp:GridView> <asp:GridView ID="GridView11" runat="server"></asp:GridView> <asp:GridView ID="GridView12" runat="server"></asp:GridView> <asp:GridView ID="GridView13" runat="server"></asp:GridView> <asp:GridView ID="GridView14" runat="server"></asp:GridView>
How to create n Number of gridview based on class c#
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