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This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
RuntimeEnvironment Class

Provides a collection of static methods that return information about the common language runtime environment.

Namespace:  System.Runtime.InteropServices
Assembly:  mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
<ComVisibleAttribute(True)> _
Public Class RuntimeEnvironment
Visual Basic (Usage)
Dim instance As RuntimeEnvironment
C#
[ComVisibleAttribute(true)]
public class RuntimeEnvironment
Visual C++
[ComVisibleAttribute(true)]
public ref class RuntimeEnvironment
JScript
public class RuntimeEnvironment

This example shows how to call many of the methods defined by the RuntimeEnvironment class.

Visual Basic
Imports System
Imports System.Reflection
Imports System.Runtime.InteropServices



Public NotInheritable Class App

    Shared Sub Main()
        ' Show whether the EXE assembly was loaded from the GAC or from a private subdirectory.
        Console.WriteLine("Did the {0} assembly load from the GAC? {1}", [Assembly].GetExecutingAssembly(), RuntimeEnvironment.FromGlobalAccessCache([Assembly].GetExecutingAssembly()))
        ' Show the path where the CLR was loaded from.
        Console.WriteLine("Runtime directory: {0}", RuntimeEnvironment.GetRuntimeDirectory())
        ' Show the CLR's version number.
        Console.WriteLine("System version: {0}", RuntimeEnvironment.GetSystemVersion())
        ' Show the path of the machine's configuration file.
        Console.WriteLine("System configuration file: {0}", RuntimeEnvironment.SystemConfigurationFile)
    End Sub
End Class

' This code produces the following output.
'
' Did the RuntimeEnvironment, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
' assembly load from the GAC? False
' Runtime directory: C:\WINDOWS\Microsoft.NET\Framework\v2.0.40607\
' System version: v2.0.40607
' System configuration file: C:\WINDOWS\Microsoft.NET\Framework\v2.0.40607\config\
' machine.config

C#
using System;
using System.Reflection;
using System.Runtime.InteropServices;

public sealed class App 
{
    static void Main() 
    {       
        // Show whether the EXE assembly was loaded from the GAC or from a private subdirectory.
        Console.WriteLine("Did the {0} assembly load from the GAC? {1}",
           Assembly.GetExecutingAssembly(),
           RuntimeEnvironment.FromGlobalAccessCache(Assembly.GetExecutingAssembly()));

        // Show the path where the CLR was loaded from.
        Console.WriteLine("Runtime directory: {0}", RuntimeEnvironment.GetRuntimeDirectory());

        // Show the CLR's version number.
        Console.WriteLine("System version: {0}", RuntimeEnvironment.GetSystemVersion());

        // Show the path of the machine's configuration file.
        Console.WriteLine("System configuration file: {0}", RuntimeEnvironment.SystemConfigurationFile);
    }
}

// This code produces the following output.
//
// Did the RuntimeEnvironment, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
// assembly load from the GAC? False
// Runtime directory: C:\WINDOWS\Microsoft.NET\Framework\v2.0.40607\
// System version: v2.0.40607
// System configuration file: C:\WINDOWS\Microsoft.NET\Framework\v2.0.40607\config\
// machine.config

Visual C++
using namespace System;
using namespace System::Reflection;
using namespace System::Runtime::InteropServices;

int main()
{
    // Show whether the EXE assembly was loaded from the GAC or from a
    // private subdirectory.
    Console::WriteLine("Did the {0} assembly load from the GAC? {1}",
        Assembly::GetExecutingAssembly(),
        RuntimeEnvironment::FromGlobalAccessCache(
        Assembly::GetExecutingAssembly()));

    // Show the path where the CLR was loaded from.
    Console::WriteLine("Runtime directory: {0}",
        RuntimeEnvironment::GetRuntimeDirectory());

    // Show the CLR's version number.
    Console::WriteLine("System version: {0}",
        RuntimeEnvironment::GetSystemVersion());

    // Show the path of the machine's configuration file.
    Console::WriteLine("System configuration file: {0}",
        RuntimeEnvironment::SystemConfigurationFile);
}

// This code produces the following output.
//
// Did the RuntimeEnvironment, Version=0.0.0.0, Culture=neutral,
// PublicKeyToken=null
// assembly load from the GAC? False
// Runtime directory: C:\WINDOWS\Microsoft.NET\Framework\v2.0.40607\
// System version: v2.0.40607
// System configuration file:
// C:\WINDOWS\Microsoft.NET\Framework\v2.0.40607\config\machine.config

System..::.Object
  System.Runtime.InteropServices..::.RuntimeEnvironment
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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