How to set browser specific properties in the code-behind - ASP.NET

switch (Request.Browser.Browser.ToLower())
{
   case "ie":
 if (Request.Browser.MajorVersion == 7)
     labelText.Text = "Hello IE7!";
 else
     labelText.Text = "Hello IE (time to upgrade!)";
 break;
   case "firefox":
 labelText.Text = "Hello Firefox";
 break;
   default:
 labelText.Text = "Hello other browser";
 break;
}