Obtaining computer SID and Processor ID using C#

Sometimes you have to track a unique identifier for an application (e.g. license key registration). Here are two small C# methods to get the Windows SID (Security ID) and the motherboard processor ID (may be more than one).

using System;
using System.Linq;
using System.Management;
using System.Security.Principal;

namespace ConsoleTest
{
   class Program
   {
      static void Main(string[] args)
      {
         new Program().Run(args);
      }

      private void Run(string[] args)
      {
         string sid = UserSecurityId();
         Console.WriteLine("The SID is: {0}", sid);

         string[] processorIds = ComputerProcessorId();
         foreach (string id in processorIds)
         {
            Console.WriteLine("Processor ID: {0}", id);
         }
      }

      public string UserSecurityId()
      {
         return WindowsIdentity.GetCurrent().User.AccountDomainSid.ToString();
      }

      public string[] ComputerProcessorId()
      {
         return new ManagementObjectSearcher("Select * from Win32_Processor")
            .Get()
            .OfType<ManagementObject>()
            .Select(o => o["ProcessorID"].ToString())
            .ToArray();
      }
   }
}