How to detect login users’s device name and Model Number?

Question

I have tried for Both, But I am getting result for the BrowserName and Version.

 

var BrowserName =System.Web.HttpContext.Current.Request.Browser.Browser; //Giving browsername

 

var Version =System.Web.HttpContext.Current.Request.Browser.Version;//Giving Version NoOf Browser

 

var DeviceTypes = "";`var DeviceModel = "";

 

Like if a user login using Samsung Mobile then t should return Samsing Device name and Model whatever like Note 7 or whatever.