Using Default Image If None Selected In Cs Environment

I've found this piece of code that seems to work fine when in a vb enviroment. But when I put it in a cs page it errors.

Compiler Error Message: CS1026: ) expected
Source Error:
Line 69: <table border="1" width="600" cellpadding="2">
Line 70: <tr>
Line 71: <td colspan="5"><asp:HyperLink runat="server" NavigateUrl='<%# Eval("Id", "~/ShowAd.aspx?id={0}") %>'><asp:Image runat="server" ImageUrl='<%# IIf(Eval("PreviewImageId") Is DbNull.Value, "Images/NoImage-Sm.jpg", Eval("PreviewImageId", "PhotoDisplay.ashx?photoid={0}&size=Small")) %>' />
Line 72: </asp:HyperLink>
Line 73: </td>
<asp:HyperLink runat="server" NavigateUrl='<%# Eval("Id", "~/ShowAd.aspx?id={0}") %>'>
<asp:Image AlternateText="Ad preview photo" runat="server"
ImageUrl='<%# IIf(Eval("PreviewImageId") Is DbNull.Value, "Images/NoImage-Sm.jpg", Eval("PreviewImageId", "PhotoDisplay.ashx?photoid={0}&size=Small")) %>' />
</asp:Hyperlink>

I used a starter kit to test it, between vb and cs. I'm guessing cs needs something slightly different.