using System.Security.Principal;
 string nam =WindowsIdentity.GetCurrent().Name;
            
            String nam2= Environment.GetEnvironmentVariable("USERNAME");
           
          
            string nam3 = WindowsIdentity.GetCurrent().Owner.ToString();
           
            string nam4 = WindowsIdentity.GetCurrent().AuthenticationType.ToString();
            
            string nam5 = WindowsIdentity.GetCurrent().Groups.ToString();
            string nam6 = WindowsIdentity.GetCurrent().ImpersonationLevel.ToString();
            
            string nam7 = WindowsIdentity.GetCurrent().IsAnonymous.ToString();
            
            string nam8 = WindowsIdentity.GetCurrent().User.ToString();
          

            String nam9 = Environment.CommandLine.ToString();
            
            String nam10 = Environment.CurrentDirectory.ToString();
            
            String nam11 = Environment.MachineName.ToString();
            
            String nam12 = Environment.NewLine.ToString();
            
            String nam13 = Environment.CommandLine.ToString();
            String nam14 = Environment.OSVersion.ToString();
          
            String nam15 = Environment.ProcessorCount.ToString();
            
            String nam16 = Environment.SystemDirectory.ToString();
           
            String nam17 = Environment.TickCount.ToString();
            
            String nam18 = Environment.UserDomainName.ToString();
            
            String nam19 = Environment.UserInteractive.ToString();
            
            String nam20 = Environment.UserName.ToString();
           
            String nam21 = Environment.Version.ToString();
         
            String nam22= Environment.WorkingSet.ToString();