How to identify whether the request is from a mobile application or mobile browser using ASP.NET

Can you try this code in BasePublicController.cs


protected override ViewResult View(IView view, object model)
{
return base.View(view, model);
}

protected override ViewResult View(string viewName, string masterName, object model)
{

string action = this.ControllerContext.RouteData.Values["action"].ToString();
if (Request.Browser.IsMobileDevice && Request.HttpMethod == "Get")
{
Response.Write("mobile");
return View(action);

}
else
{
Response.Write("desktop");
return View(action);
}
}