Browser detection

System.Web.HttpBrowserCapabilities browser = Request.Browser;
string name = browser.Browser;
float version = (float)(browser.MajorVersion + browser.MinorVersion);
if ((name == “IE” && version >= 7) || (name == “Firefox” && version >= 2))
{
// You are using IE 7( or later) or Firexfox 2( or later)
}