Make span element visible in ItemBound event of repeater

I got this in Repeater's item template

<span style="color: green;" id="TickMark" visible="false" runat="server">&radic;</span>

In ItemBound event intellisense is not detecting this ID "TickMark"

I need to make √ ie Square roo开发者_运维百科t symbol visible inside data bound

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Found the control like this :-

((HtmlControl)e.Item.FindControl("TickMark")).Visible = false;

it worked