new { controller = new NotEqual("Admin")} 报错解决方案

new { controller = new NotEqual("Admin")} 报错
new { controller = new NotEqual("Admin")} 里 NotEqual 报错，NotEqual这个东西该引用哪个命名空间啊？

[解决办法]
http://msdn.microsoft.com/zh-cn/library/dd484659%28VS.100%29.aspx