我在ASP.NET MVC 5项目中下载了Mvc4Future nuget包.当我使用ActionFilter属性如[AjaxOnly]时会导致“类型违反的继承安全规则”异常.这是完整的信息：

Inheritance security rules violated by type: ‘Microsoft.Web.Mvc.AjaxOnlyAttribute’. Derived types must either match the security accessibility of the base type or be less accessible.

我该如何解决这个问题？