C# Environmment static class

Environment is static class which provides information about, and means to manipulate, the current environment and platform.
Example: List all the enumerated constants for special folders

using System;
namespace ConsoleEnvironment
{
    class Program
    {
        static void Main(string[] args)
        {
            foreach (var item in Enum.GetNames(typeof(Environment.SpecialFolder)))
            {
                var enumValue = (int)Enum.Parse(typeof(Environment.SpecialFolder), item);
                Console.WriteLine(item + " " + enumValue);
            }
            Console.ReadKey();
        }
    }
}

OUTPUT

• Desktop 0
• Programs 2
• MyDocuments 5
• Personal 5
• Favorites 6
• Startup 7
• Recent 8
• SendTo 9
• StartMenu 11
• MyMusic 13
• MyVideos 14
• DesktopDirectory 16
• MyComputer 17
• NetworkShortcuts 19
• Fonts 20
• Templates 21
• CommonStartMenu 22
• CommonPrograms 23
• CommonStartup 24
• CommonDesktopDirectory 25
• ApplicationData 26
• PrinterShortcuts 27
• LocalApplicationData 28
• InternetCache 32
• Cookies 33
• History 34
• CommonApplicationData 35
• Windows 36
• System 37
• ProgramFiles 38
• MyPictures 39
• UserProfile 40
• SystemX86 41
• ProgramFilesX86 42
• CommonProgramFiles 43
• CommonProgramFilesX86 44
• CommonTemplates 45
• CommonDocuments 46
• CommonAdminTools 47
• AdminTools 48
• CommonMusic 53
• CommonPictures 54
• CommonVideos 55
• Resources 56
• LocalizedResources 57
• CommonOemLinks 58
• CDBurning 59

Example: Alphabetical list of all the enumerated constants for special folders

using System;
namespace ConsoleEnvironment
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] MyArr = Enum.GetNames(typeof(Environment.SpecialFolder));
            Array.Sort(MyArr);
            foreach (var item in MyArr)
            {
                var enumValue = (int)Enum.Parse(typeof(Environment.SpecialFolder), item);
                Console.WriteLine(item + " " + enumValue);
            }
            Console.ReadKey();
        }
    }
}

OUTPUT

• AdminTools 48
• ApplicationData 26
• CDBurning 59
• CommonAdminTools 47
• CommonApplicationData 35
• CommonDesktopDirectory 25
• CommonDocuments 46
• CommonMusic 53
• CommonOemLinks 58
• CommonPictures 54
• CommonProgramFiles 43
• CommonProgramFilesX86 44
• CommonPrograms 23
• CommonStartMenu 22
• CommonStartup 24
• CommonTemplates 45
• CommonVideos 55
• Cookies 33
• Desktop 0
• DesktopDirectory 16
• Favorites 6
• Fonts 20
• History 34
• InternetCache 32
• LocalApplicationData 28
• LocalizedResources 57
• MyComputer 17
• MyDocuments 5
• MyMusic 13
• MyPictures 39
• MyVideos 14
• NetworkShortcuts 19
• Personal 5
• PrinterShortcuts 27
• ProgramFiles 38
• ProgramFilesX86 42
• Programs 2
• Recent 8
• Resources 56
• SendTo 9
• StartMenu 11
• Startup 7
• System 37
• SystemX86 41
• Templates 21
• UserProfile 40
• Windows 36

Environment Other Examples

using System;
namespace ConsoleEnvironment
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.Cookies));
            Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop));
            Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments));
            Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.MyMusic));
            Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.MyVideos));
            //Console.WriteLine(Environment.GetEnvironmentVariable("PATH"));
            Console.WriteLine("AppData Path: {0}",Environment.GetEnvironmentVariable("APPDATA"));
            Console.WriteLine("OS: {0}",Environment.GetEnvironmentVariable("OS"));
            Console.WriteLine("Username: {0}",Environment.GetEnvironmentVariable("USERNAME"));
            Console.WriteLine("Current Directory: {0}", Environment.CurrentDirectory);
            Console.WriteLine("Is64BitOperatingSystem: {0}", Environment.Is64BitOperatingSystem);
            Console.WriteLine("MachineName: {0}", Environment.MachineName);
            Console.WriteLine("OS Version: {0}",Environment.OSVersion);

            Console.ReadKey();
        }
    }
}

OUTPUT

• C:\Users\AJEET\AppData\Local\Microsoft\Windows\INetCookies
• C:\Users\AJEET\Desktop
• C:\Users\AJEET\Documents
• C:\Users\AJEET\Music
• C:\Users\AJEET\Videos
• AppData Path: C:\Users\AJEET\AppData\Roaming
• OS: Windows_NT
• Username: AJEET
• Current Directory: C:\Users\AJEET\Desktop\Apple\MvcEx\ConsoleEnvironment\ConsoleEnvironment\bin\Debug
• Is64BitOperatingSystem: True
• MachineName: IN-AJEET-LT
• OS Version: Microsoft Windows NT 6.2.9200.0

Example : To list all the Environment Variables

using System;
namespace ConsoleEnvironment
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Collections.IDictionary envsCollection = Environment.GetEnvironmentVariables();
            
            foreach (var envKey in envsCollection.Keys) //Also, envsCollection.Values 
            {
                Console.WriteLine(envKey + " -> "+Environment.GetEnvironmentVariable(envKey.ToString()));
            }
            Console.ReadKey();
        }
    }
}

OUTPUT

• PROCESSOR_ARCHITEW6432 -> AMD64
• DriverData -> C:\Windows\System32\Drivers\DriverData
• COMPUTERNAME -> IN-AJEET-LT
• CommonProgramFiles(x86) -> C:\Program Files (x86)\Common Files
• OneDrive -> C:\Users\AJEET\OneDrive
• HOMEPATH -> \Users\AJEET
• VisualStudioEdition -> Microsoft Visual Studio Community 2019
• ServiceHubLogSessionKey -> 06E4FFF5
• CLASSPATH -> C:\Users\AJEET\Desktop\Java_Work
• PROCESSOR_REVISION -> 8e09
• PATHEXT -> .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
• PkgDefApplicationConfigFile -> C:\Users\AJEET\AppData\Local\Microsoft\VisualStudio\16.0_3d68e095\devenv.exe.config
• VS120COMNTOOLS -> C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\
• TMP -> C:\Users\AJEET\AppData\Local\Temp
• TEMP -> C:\Users\AJEET\AppData\Local\Temp
• LOCALAPPDATA -> C:\Users\AJEET\AppData\Local
• PUBLIC -> C:\Users\Public
• VSAPPIDNAME -> devenv.exe
• SignInWithHomeTenantOnly -> True
• ProgramW6432 -> C:\Program Files
• USERDOMAIN -> IN-AJEET-LT
• ProgramFiles(x86) -> C:\Program Files (x86)
• PROCESSOR_LEVEL -> 6
• PROCESSOR_IDENTIFIER -> Intel64 Family 6 Model 142 Stepping 9, GenuineIntel
• ForceIdentityAuthenticationType -> Embedded
• MSBuildLoadMicrosoftTargetsReadOnly -> true
• _NO_DEBUG_HEAP -> 1
• PSModulePath -> C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules;c:\Program Files (x86)\Microsoft SQL Server\110\Tools\PowerShell\Modules\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\PowerShell\Modules\
• NUMBER_OF_PROCESSORS -> 4
• git -> C:\Program Files\Git\bin
• CommonProgramFiles -> C:\Program Files (x86)\Common Files
• NVTOOLSEXT_PATH -> C:\Program Files\NVIDIA Corporation\NvToolsExt\
• VisualStudioDir -> C:\Users\AJEET\Documents\Visual Studio 2019
• VSLS_SESSION_KEEPALIVE_INTERVAL -> 0
• ProgramData -> C:\ProgramData
• ProgramFiles -> C:\Program Files (x86)
• PATH -> C:\Program Files\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\Microsoft.NET\Framework64\v4.0.30319;c:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;c:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;c:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\;c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies\;C:\Program Files\Microsoft\Web Platform Installer\;C:\Users\AJEET\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\Azure Data Studio\bin;C:\Users\AJEET\AppData\Local\Microsoft\WindowsApps;C:\Program Files\JetBrains\PyCharm Community Edition 2019.1.2\bin;;C:\Program Files\Java\jdk-11.0.8\bin;;C:\Users\AJEET\AppData\Local\Programs\Microsoft VS Code\bin;C:\Program Files\Azure Data Studio\bin;C:\Users\AJEET\.dotnet\tools
• ChocolateyInstall -> C:\ProgramData\chocolatey
• ENABLE_XAML_DIAGNOSTICS_SOURCE_INFO -> 1
• PyCharm Community Edition -> C:\Program Files\JetBrains\PyCharm Community Edition 2019.1.2\bin;
• VSSKUEDITION -> Community
• ThreadedWaitDialogDpiContext -> -4
• SystemRoot -> C:\WINDOWS
• VSAPPIDDIR -> C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\
• SESSIONNAME -> Console
• VisualStudioVersion -> 16.0
• CommonProgramW6432 -> C:\Program Files\Common Files
• LOGONSERVER -> \\IN-AJEET-LT
• USERPROFILE -> C:\Users\AJEET
• FPS_BROWSER_USER_PROFILE_STRING -> Default
• VS140COMNTOOLS -> C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\
• VSLANG -> 1033
• USERDOMAIN_ROAMINGPROFILE -> IN-AJEET-LT
• APPDATA -> C:\Users\AJEET\AppData\Roaming
• HOMEDRIVE -> C:
• configsetroot -> C:\WINDOWS\ConfigSetRoot
• VS110COMNTOOLS -> C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\Tools\
• USERNAME -> AJEET
• FPS_BROWSER_APP_PROFILE_STRING -> Internet Explorer
• PROCESSOR_ARCHITECTURE -> x86
• OS -> Windows_NT
• ComSpec -> C:\WINDOWS\system32\cmd.exe
• SystemDrive -> C:
• windir -> C:\WINDOWS
• OneDriveConsumer -> C:\Users\AJEET\OneDrive
• ALLUSERSPROFILE -> C:\ProgramData