Despite how this looks, I think it works:
Code:
<link rel="stylesheet" type="text/css"
href="<asp:Literal runat="server" id="litStyleSheetURL" />">
Then you set the literal value in your code behind. (Don't forget to set up the literal field in the codebehind class.)
OR
Code:
<asp:Literal runat="server" id="litStyleSheetLink" />
and generate the whole <link> tag text in the codebehind.
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Peter
Somewhere outside Boston, MA USA