Environment Class
Provides information about, and means to manipulate, the current environment and platform. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
The following example demonstrates displays a list of information about the current environment.
// Sample for Environment class summary using System; using System.Collections; class Sample { public static void Main() { String str; String nl = Environment.NewLine; // Console.WriteLine(); Console.WriteLine("-- Environment members --"); // Invoke this sample with an arbitrary set of command line arguments. Console.WriteLine("CommandLine: {0}", Environment.CommandLine); String[] arguments = Environment.GetCommandLineArgs(); Console.WriteLine("GetCommandLineArgs: {0}", String.Join(", ", arguments)); // <-- Keep this information secure! --> Console.WriteLine("CurrentDirectory: {0}", Environment.CurrentDirectory); Console.WriteLine("ExitCode: {0}", Environment.ExitCode); Console.WriteLine("HasShutdownStarted: {0}", Environment.HasShutdownStarted); // <-- Keep this information secure! --> Console.WriteLine("MachineName: {0}", Environment.MachineName); Console.WriteLine("NewLine: {0} first line{0} second line{0} third line", Environment.NewLine); Console.WriteLine("OSVersion: {0}", Environment.OSVersion.ToString()); Console.WriteLine("StackTrace: '{0}'", Environment.StackTrace); // <-- Keep this information secure! --> Console.WriteLine("SystemDirectory: {0}", Environment.SystemDirectory); Console.WriteLine("TickCount: {0}", Environment.TickCount); // <-- Keep this information secure! --> Console.WriteLine("UserDomainName: {0}", Environment.UserDomainName); Console.WriteLine("UserInteractive: {0}", Environment.UserInteractive); // <-- Keep this information secure! --> Console.WriteLine("UserName: {0}", Environment.UserName); Console.WriteLine("Version: {0}", Environment.Version.ToString()); Console.WriteLine("WorkingSet: {0}", Environment.WorkingSet); // No example for Exit(exitCode) because doing so would terminate this example. // <-- Keep this information secure! --> String query = "My system drive is %SystemDrive% and my system root is %SystemRoot%"; str = Environment.ExpandEnvironmentVariables(query); Console.WriteLine("ExpandEnvironmentVariables: {0} {1}", nl, str); Console.WriteLine("GetEnvironmentVariable: {0} My temporary directory is {1}.", nl, Environment.GetEnvironmentVariable("TEMP")); Console.WriteLine("GetEnvironmentVariables: "); IDictionary environmentVariables = Environment.GetEnvironmentVariables(); foreach (DictionaryEntry de in environmentVariables) { Console.WriteLine(" {0} = {1}", de.Key, de.Value); } Console.WriteLine("GetFolderPath: {0}", Environment.GetFolderPath(Environment.SpecialFolder.System)); String[] drives = Environment.GetLogicalDrives(); Console.WriteLine("GetLogicalDrives: {0}", String.Join(", ", drives)); } } /* This example produces results similar to the following: (Any result that is lengthy or reveals information that should remain secure has been omitted and marked "!---OMITTED---!".) C:\>env0 ARBITRARY TEXT -- Environment members -- CommandLine: env0 ARBITRARY TEXT GetCommandLineArgs: env0, ARBITRARY, TEXT CurrentDirectory: C:\Documents and Settings\!---OMITTED---! ExitCode: 0 HasShutdownStarted: False MachineName: !---OMITTED---! NewLine: first line second line third line OSVersion: Microsoft Windows NT 5.1.2600.0 StackTrace: ' at System.Environment.GetStackTrace(Exception e) at System.Environment.GetStackTrace(Exception e) at System.Environment.get_StackTrace() at Sample.Main()' SystemDirectory: C:\WINNT\System32 TickCount: 17995355 UserDomainName: !---OMITTED---! UserInteractive: True UserName: !---OMITTED---! Version: !---OMITTED---! WorkingSet: 5038080 ExpandEnvironmentVariables: My system drive is C: and my system root is C:\WINNT GetEnvironmentVariable: My temporary directory is C:\DOCUME~1\!---OMITTED---!\LOCALS~1\Temp. GetEnvironmentVariables: !---OMITTED---! GetFolderPath: C:\WINNT\System32 GetLogicalDrives: A:\, C:\, D:\ */
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.