Asp.net user-agent parse

private float getInternetExplorerVersion()
{
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
float rv = -1;
System.Web.HttpBrowserCapabilities browser = Request.Browser;
if (browser.Browser == "IE")
rv = (float)(browser.MajorVersion + browser.MinorVersion);
return rv;
}

private void Page_Load(object sender, System.EventArgs e)
{
string msg;
double ver = getInternetExplorerVersion();
if (ver > 0.0)
{
if (ver >= 7.0)
msg = "You're using a recent version of Internet Explorer.";
else
msg = "You should upgrade your copy of Internet Explorer.";
}
else
msg = "You're not using Internet Explorer.";

Label1.Text = msg;
}

Reference:
http://msdn.microsoft.com/en-us/library/ms537509%28v=vs.85%29.aspx