Question about System.OperatingSystem class

Question

The following piece of code

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            OperatingSystem os = Environment.OSVersion;
            Console.WriteLine( os.Version.Major.ToString());
            Console.ReadLine();
        }
    }
}

Outputs 6 on both Vista and Win7 How can I tell if my code is running on Win7 or pre Win7 This is using .NET frameworks 2.0

Answer 1

Look at the Version.Minor property. It is 0 for Vista, 1 for Windows 7.

In other words, your code could be:

        OperatingSystem os = Environment.OSVersion;
        string version;
        if ( os.Version.Major < 6 ) 
            version = "Older Windows";
        else if (os.Version.Major == 6 ) 
        {
             if (os.Version.Minor == 0 ) 
                 version = "Vista";
             if (os.Version.Minor == 1 ) 
                 version = "Windows 7"
        }

Answer 2

Check the Minor version. 6.0 is Vista, 6.1 is Windows7.

Check this excellent post about detecting OS version, and read the discussion for differentiating servers from workstations as well.