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Copy Registry

using System; using System.Linq; using System.Collections.Generic; using System.Text; using Microsoft.Win32; namespace Regedit {     class RegistryUtils     {         public static RegistryKey OpenKeyFromPath(string keyPath, bool writableKey)         {             if (string.IsNullOrEmpty(keyPath))                 return null;             string[] pathElements = keyPath.Split(new[] { '\\' });             // Getting the first element             string rootKeyName = pathElements[0];             string subPath = keyPath.IndexOf('\\') == -1 ? keyPath : keyPath.Substring(keyPath.IndexOf('\\'));             try             {                 if (pathElements.Length == 1) // Root nodes have been selected.                 {                     if (rootKeyName == Registry.ClassesRoot.Name)                         return Registry.ClassesRoot;                     else if (rootKeyName == Registry.CurrentUser.Name)                         return Registry.CurrentUser;                     else if (rootKeyName == Registry.LocalMachine.Name)                         return Registry.LocalMachine;                     else if (rootKeyName == Registry.Users.Name)                         return Registry.Users;                 }                 else                 {                     if (rootKeyName == Registry.ClassesRoot.Name)                         return Registry.ClassesRoot.OpenSubKey(subPath, writableKey);                     else if (rootKeyName == Registry.CurrentUser.Name)                         return Registry.CurrentUser.OpenSubKey(subPath, writableKey);                     else if (rootKeyName == Registry.LocalMachine.Name)                         return Registry.LocalMachine.OpenSubKey(subPath, writableKey);                     else if (rootKeyName == Registry.Users.Name)                         return Registry.Users.OpenSubKey(subPath, writableKey);                 }                     return null;             }             catch             {                 return null;             }         }         /// <summary>         /// Renames a subkey of the passed in registry key since          /// the Framework totally forgot to include such a handy feature.         /// </summary>         /// <param name="parentKey">The RegistryKey that contains the subkey          /// you want to rename (must be writeable)</param>         /// <param name="subKeyName">The name of the subkey that you want to rename         /// </param>         /// <param name="newSubKeyName">The new name of the RegistryKey</param>         /// <returns>True if succeeds</returns>         public static bool RenameSubKey(RegistryKey parentKey,             string subKeyName, string newSubKeyName)         {             CopyKey(parentKey, subKeyName, newSubKeyName);             parentKey.DeleteSubKeyTree(subKeyName);             parentKey.Flush();             return true;         }         /// <summary>         /// Copy a registry key.  The parentKey must be writeable.         /// </summary>         /// <param name="parentKey"></param>         /// <param name="keyNameToCopy"></param>         /// <param name="newKeyName"></param>         /// <returns></returns>         public static bool CopyKey(RegistryKey parentKey,             string keyNameToCopy, string newKeyName)         {             //Create new key             RegistryKey destinationKey = parentKey.CreateSubKey(newKeyName);             //Open the sourceKey we are copying from             RegistryKey sourceKey = parentKey.OpenSubKey(keyNameToCopy, true);             RecurseCopyKey(sourceKey, destinationKey);             return true;         }         private static void RecurseCopyKey(RegistryKey sourceKey, RegistryKey destinationKey)         {             //copy all the values             foreach (string valueName in sourceKey.GetValueNames())             {                 object objValue = sourceKey.GetValue(valueName);                 RegistryValueKind valKind = sourceKey.GetValueKind(valueName);                 destinationKey.SetValue(valueName, objValue, valKind);             }             //For Each subKey              //Create a new subKey in destinationKey              //Call myself              foreach (string sourceSubKeyName in sourceKey.GetSubKeyNames())             {                 RegistryKey sourceSubKey = sourceKey.OpenSubKey(sourceSubKeyName, true);                 RegistryKey destSubKey = destinationKey.CreateSubKey(sourceSubKeyName);                 RecurseCopyKey(sourceSubKey, destSubKey);             }             // Close it when finished so it can be deleted later in the final step             sourceKey.Close();             destinationKey.Close();         }     } }