Replace this:
<link id="Link1" runat="server" rel="shortcut icon" href="~/favicon.ico" type="image/x-icon" />
<link id="Link2" runat="server" rel="icon" href="~/favicon.ico" type="image/ico" />
With
<link rel="shortcut icon" type="image/x-icon" href="~/favicon.ico" />
You can download standard icon here.