Try add the following name space<div><br></div><div><span class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: Arial, Helvetica; font-size: 13px; ">System.Web.UI.HtmlControls.HtmlHead</span><br><div><div><span class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: Arial, Helvetica; font-size: 13px; "><p>
HtmlHead header = this.Page.Header as HtmlHead;</p><p>      <span class="Apple-style-span" style="color: rgb(0, 0, 0); font-family: arial, sans-serif; border-collapse: collapse; "> If rblCSS1.SelectedValue = &quot;ShowCSS1&quot; Then</span></p>
<p>       {</p><p>           HtmlLink link = new HtmlLink();</p><p>           link.Attributes.Add(&quot;href&quot;, &quot;~/DIRECTORY_PATH/<span class="Apple-style-span" style="color: rgb(0, 0, 0); font-family: arial, sans-serif; border-collapse: collapse; ">css1.css</span>&quot;);</p>
<p>           link.Attributes.Add(&quot;media&quot;, &quot;screen&quot;);</p><p>           link.Attributes.Add(&quot;rel&quot;, &quot;stylesheet&quot;);</p><p>           link.Attributes.Add(&quot;type&quot;, &quot;text/css&quot;);</p>
<p>           header.Controls.Add(link);</p><p>       }</p></span><br><div class="gmail_quote">On 28 January 2011 18:23, Edwin Wambua <span dir="ltr">&lt;<a href="mailto:eddwak@gmail.com">eddwak@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Thanks.<br>Sounds very simple but I can&#39;t get it to work.I got some additional info <a href="http://msdn.microsoft.com/en-us/library/75ydzzy6%28VS.80%29.aspx" target="_blank">here</a> It doesnt recognise the <span>stylesheet.Href I suspect there&#39;s a namespace I havent included</span> apart from <span><b>System.Web.UI.Page</b></span> and  <b>System.Web.UI.HtmlControls</b> or is it referenced differently in VS2010,which I&#39;m using?<br clear="all">


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