ViewSelector For Asp.net MVC - multiserve for one request in asp.net mvc- viewselector based browser

ViewSelectorAttribute.cs

public class BrowserSpecificAttribute : ActionFilterAttribute
{
  public override void OnResultExecuting(ResultExecutingContext filterContext)
  {
    var viewResult = filterContext.Result as ViewResult;
    if (viewResult == null)
      return;
    // Figure out the view name
    var context = filterContext.Controller.ControllerContext;
    var viewName = viewResult.ViewName;
    if (String.IsNullOrEmpty(viewName))
      viewName = context.RouteData.GetRequiredString("action");
    if (String.IsNullOrEmpty(viewName))
      return;
    // Resolve the view selector
    var viewSelector = DependencyResolver.Current.GetService(typeof (IViewSelector))  as IViewSelector;
    if (viewSelector == null)
      viewSelector = new DefaultViewSelector();
    // Figure out the browser name
    var isMobileDevice = context.HttpContext.Request.Browser.IsMobileDevice;
    var browserName = (isMobileDevice ?"mobile" :context.HttpContext.Request.Browser.Browser);
    // Get the name of the browser-specific view to use
    var newViewName = viewSelector.GetViewName(viewName, browserName);
    if (String.IsNullOrEmpty(newViewName))
      return;
    // Is there such a view?
    var result = System.Web.Mvc.ViewEngines.Engines.FindView(context, newViewName, viewResult.MasterName);
    if (result.View != null)
      viewResult.ViewName = newViewName;
  }
}

public class DefaultViewSelector : IViewSelector
{
  public String GetViewName(String viewName, String browserName)
  {
    return String.Format("{0}_{1}", viewName, browserName);
  }
  public String GetMasterName(String masterName, String browserName)
  {
    return String.Format("{0}_{1}", masterName, browserName);
  }
}