how to enable right click in link button in repeater in asp.net C#

protected void dlcategory_ItemCommand(object source, DataListCommandEventArgs e)
{
    if (e.CommandName == "category")
    {
        LinkButton LinkButton1=(LinkButton)e.Item.FindControl("LinkButton1");

        Response.Redirect("~/subcategory.aspx?subcat=" + e.CommandArgument + "");
    }
}