I've built a Base Controller that all of my Controllers inherit from, and I've got it setup so that it checks the browser type and returns the appropriate MasterPageFile on the fly.

I'm wondering if this is an efficient way to do this or if I should optimize it another way.

Public Class BaseController : Inherits System.Web.Mvc.Controller

    Protected Overrides Function View(ByVal viewName As String, ByVal masterName As String, ByVal model As Object) As System.Web.Mvc.ViewResult

        If Request.Browser.IsMobileDevice Then
            Return MyBase.View(viewName, "Mobile", model)
        Else
            Return MyBase.View(viewName, "Site", model)
        End If

    End Function

End Class