Instead of using
RoundedCornersExtender
, I suggest you to use CSS'
border-radius
property..
Example :-
CSS :
.RoundedCorners
{
border : solid 2px Gray;
-webkit-border-radius : 2px;
-moz-border-radius : 2px ;
}
aspx :
<asp:panel id="panel1" runat="server" cssclass="RoundedCorners" xmlns:asp="#unknown">
// your content
</asp:panel>