How to display useragent information in ASP.NET?

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MVC4

I need to display browser with veriosn and device and OS but not displaying propr values with my code.
could you please correct me .


The below code is getting incorrect data.


I am using laptop with windows 10 and browser chrome.

so result should be display with Chrome and lap and windows 10

But my result is displaying like below

OS: Windows 10 ~ Browser: Chrome Major: 65 Minor: 0

there is no my device

What I have tried:

private string getUserAgent()
       {
           if (null == HttpContext.Current || null == HttpContext.Current.Request)
               return null;


           return HttpContext.Current.Request.Headers["User-Agent"].ToString();
       }
       private string GetUserAgentInfo(string userAgentFromAPI)
       {

           userAgentFromAPI = userAgentFromAPI.Trim();
           var uaParser = Parser.GetDefault();
           ClientInfo clientInfo = uaParser.Parse(userAgentFromAPI);
           string osMajorandMinor = string.Empty;
           string browserMajorandMinor = string.Empty;
           string device = string.Empty;
           if (clientInfo.OS.Major != null) { osMajorandMinor = " Major: " + clientInfo.OS.Major + " Minor: " + clientInfo.OS.Minor; }
           if (clientInfo.UserAgent.Major != null) { browserMajorandMinor = " Major: " + clientInfo.UserAgent.Major + " Minor: " + clientInfo.UserAgent.Minor; }
           if (clientInfo.Device.Model != "" && clientInfo.Device.Brand != "") { device = " ~ Device: " + clientInfo.Device.Family; }

           StringBuilder sbUserAgent = new StringBuilder();

           sbUserAgent.Append(
               "OS: " + clientInfo.OS.Family + osMajorandMinor
               + " ~ Browser: " + clientInfo.UserAgent.Family + browserMajorandMinor
               + device);
           return sbUserAgent.ToString();
       }