Command Line and Environment

System.Environment has a lot of cool properties and methods to describe the environment in which your code is running.

• CommandLine
  
• CurrentDirectory
  
• GetEnvironmentVariable( "CHARCODE" )
  
• GetFolderPath( Environment.SpecialFolder.Favorites )
  
• MachineName
  
• OSVersion.Platform.ToString()
  
• OSVersion.Version.ToString()
  
• StackTrace
  
• SystemDirectory
  
• TickCount
  
• UserDomainName
  
• UserInteractive
  
• UserName
  
• Version
  
• WorkingSet
  

Windows Management Instrumentation is implemented in the System.Management namespace (manually add a reference to System.Management dll before using). Using WMI Query Language (WQL), here's the code to retrieve the current user on the local machine:

	string wql = "SELECT UserName FROM Win32_ComputerSystem";

	ManagementObjectSearcher searcher = new ManagementObjectSearcher( wql );

	foreach ( ManagementObject mo in searcher.Get() )

		Console.WriteLine( mo[ "UserName" ] );