How do I show updated versions of OS version, name, etc?

Question

I have this piece of code that returns values for OS information displayed here:

 

Code 

 

//Computer Name

String q1 = System.Environment.MachineName;

metroTextBox1.Text = q1;

//User Name

String q2 = Environment.UserName;

metroTextBox2.Text = Convert.ToString(q2);

//Number of Processors

int q3 = Environment.ProcessorCount;

metroTextBox3.Text = Convert.ToString(q3);

//Operating System

String q4 = System.Environment.OSVersion.Version.ToString();

metroTextBox4.Text = q4;

//OS Platform

String q5 = System.Environment.OSVersion.Platform.ToString();

metroTextBox5.Text = q5;

 

Why does my output display for the last two values:

 

Operating System: 6.2.9200.0

OS Platform = Win32NT 

 

I would like to display a name such as "Windows 8.1" instead of the build number.