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RegistryHive Enumeration

Represents the possible values for a top-level node on a foreign machine.

Namespace:  Microsoft.Win32
Assembly:  mscorlib (in mscorlib.dll)

[SerializableAttribute]
[ComVisibleAttribute(true)]
public enum RegistryHive

Member nameDescription
ClassesRootRepresents the HKEY_CLASSES_ROOT base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
CurrentConfigRepresents the HKEY_CURRENT_CONFIG base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
CurrentUserRepresents the HKEY_CURRENT_USER base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
DynDataRepresents the HKEY_DYN_DATA base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
LocalMachineRepresents the HKEY_LOCAL_MACHINE base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
PerformanceDataRepresents the HKEY_PERFORMANCE_DATA base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
UsersRepresents the HKEY_USERS base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.

RegistryHive values are used by the OpenRemoteBaseKey method to represent the top-level node of a requested key on a foreign (remote) machine. The node that can be opened with the OpenRemoteBaseKey method must be one of these top-level RegistryKeys. Further access to the subkeys of the identified node is available using using methods in RegistryKey, so long as the the user has appropriate permission.

The following code example shows how to open a registry key on a remote computer and enumerate the values of the key. The remote computer must be running the remote registry service. Specify the name of the remote computer as a command-line argument when invoking the program.

using System;
using System.IO;
using System.Security.Permissions;
using Microsoft.Win32;


class RemoteKey
{
    static void Main(string[] args)
    {
        RegistryKey environmentKey;
        string remoteName;

        // Check that an argument was specified when the  
        // program was invoked. 
        if(args.Length == 0)
        {
            Console.WriteLine("Error: The name of the remote " +
                "computer must be specified when the program is " +
                "invoked.");
            return;
        }
        else
        {
            remoteName = args[0];
        }

        try
        {
            // Open HKEY_CURRENT_USER\Environment  
            // on a remote computer.
            environmentKey = RegistryKey.OpenRemoteBaseKey(
                RegistryHive.CurrentUser, remoteName).OpenSubKey(
                "Environment");
        }
        catch(IOException e)
        {
            Console.WriteLine("{0}: {1}", 
                e.GetType().Name, e.Message);
            return;
        }

        // Print the values.
        Console.WriteLine("\nThere are {0} values for {1}.", 
            environmentKey.ValueCount.ToString(), 
            environmentKey.Name);
        foreach(string valueName in environmentKey.GetValueNames())
        {
            Console.WriteLine("{0,-20}: {1}", valueName, 
                environmentKey.GetValue(valueName).ToString());
        }

        // Close the registry key.
        environmentKey.Close();
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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