如何在ASP中选择性地呈现一个部分。净MVC 3 ?

On my website, I have a section (a floating sidebar) that I want rendered only for a sub-set of users (admins). I'm hoping that I can put the logic in the master layout for determining if the section should be shown or not but that causes an error on the page if the section isn't rendered.On my website, I have a section (a floating sid