C# Code to identify the Mobile Device

Mobile Device:

Request.Browser["IsMobileDevice"] == "true";

BlackBerry:

Request.Browser["BlackBerry"] == "true" ;

iphone:

Request.UserAgent.ToLower().Contains("iphone");

Sample c# code:

if (Request.Headers["User-Agent"] != null && (Request.Browser["IsMobileDevice"] == "true" || Request.Browser["BlackBerry"] == "true" || Request.UserAgent.ToUpper().Contains("MIDP") || Request.UserAgent.ToUpper().Contains("CLDC")) || Request.UserAgent.ToLower().Contains("iphone"))
{
Response.Redirect("www.google.com");
}