on aspx page, put you user control inside a div -
<div class="controlParent">
<uc1:abc id="someId" runat="server" xmlns:uc1="#unknown" />
</div>
On your linkbutton add
CssClass -
<asp:linkbutton id="LinkButton1" runat="server" text="Show/Hide" cssclass="btnHide" xmlns:asp="#unknown" />
In
head section of your aspx page, write javascript like -
<!-- Add you jquery.min.js file path here, -->
<script type="text/javascript">
$(document).ready(funcyion(){
$(".btnHide").click(function(){
$(".controlParent").toggle();
});
});
</script>