using System;
using System.Collections.Generic;
using System.Linq;
using System.Management;
using System.Text;
using System.Threading.Tasks;

namespace NX_Installation
{
    /// <summary>
	/// Description of WindowsVersion.
	/// </summary>
    class WindowsVersions
    {
        // <summary>
        /// Initialisiert die Werte der Eigenschaften.
        /// </summary>
        static void init()
        {
            using (var mos = new ManagementObjectSearcher("SELECT Caption, Version FROM Win32_OperatingSystem"))
            {
                var attribs = mos.Get().OfType<ManagementObject>();
                caption = attribs.FirstOrDefault().GetPropertyValue("Caption").ToString() ?? "Unknown";
                version = new Version((attribs.FirstOrDefault().GetPropertyValue("Version") ?? "0.0.0.0").ToString());
            }
        }

        static string caption = null;
        static Version version = null;

        /// <summary>
        /// Ruft den Namen des Betriebssystems ab.
        /// </summary>
        public static string Caption
        {
            get
            {
                if (caption == null)
                    init();
                return caption;
            }
        }
        /// <summary>
        /// Ruft die Versionsnummer des Betriebssystems ab.
        /// </summary>
        public static Version Version
        {
            get
            {
                if (version == null)
                    init();
                return version;
            }
        }
    }
}