/*  Copyright (C) 2008-2016 Peter Palotas, Jeffrey Jangli, Alexandr Normuradov
 *  
 *  Permission is hereby granted, free of charge, to any person obtaining a copy 
 *  of this software and associated documentation files (the "Software"), to deal 
 *  in the Software without restriction, including without limitation the rights 
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 *  copies of the Software, and to permit persons to whom the Software is 
 *  furnished to do so, subject to the following conditions:
 *  
 *  The above copyright notice and this permission notice shall be included in 
 *  all copies or substantial portions of the Software.
 *  
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
 *  THE SOFTWARE. 
 */

using System;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Security;

namespace Alphaleonis.Win32.Filesystem
{
   partial class Directory
   {
      #region Copy

      // .NET: Directory class does not contain the Copy() method.
      // Mimic .NET File.Copy() methods.

      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is not allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, CopyOptions.FailIfExists, null, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is not allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, CopyOptions.FailIfExists, null, null, null, null, pathFormat);
      }



      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="overwrite"><see langword="true"/> if the destination directory should ignoring the read-only and hidden attributes and overwrite; otherwise, <see langword="false"/>.</param>      
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, bool overwrite)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, overwrite ? CopyOptions.None : CopyOptions.FailIfExists, null, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="overwrite"><see langword="true"/> if the destination directory should ignoring the read-only and hidden attributes and overwrite; otherwise, <see langword="false"/>.</param>      
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, bool overwrite, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, overwrite ? CopyOptions.None : CopyOptions.FailIfExists, null, null, null, null, pathFormat);
      }


      #region Transactional

      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is not allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, CopyOptions.FailIfExists, null, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is not allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, CopyOptions.FailIfExists, null, null, null, null, pathFormat);
      }



      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="overwrite"><see langword="true"/> if the destination directory should ignoring the read-only and hidden attributes and overwrite; otherwise, <see langword="false"/>.</param>      
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, bool overwrite)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, overwrite ? CopyOptions.None : CopyOptions.FailIfExists, null, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies an existing directory to a new directory. Overwriting a directory of the same name is allowed.
      /// <remarks>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="overwrite"><see langword="true"/> if the destination directory should ignoring the read-only and hidden attributes and overwrite; otherwise, <see langword="false"/>.</param>      
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, bool overwrite, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, overwrite ? CopyOptions.None : CopyOptions.FailIfExists, null, null, null, null, pathFormat);
      }

      #endregion // Transactional

      #endregion // Copy


      #region Copy (CopyOptions)

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, CopyOptions copyOptions)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, copyOptions, null, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, CopyOptions copyOptions, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, copyOptions, null, null, null, null, pathFormat);
      }
      
      

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, CopyOptions copyOptions, CopyMoveProgressRoutine progressHandler, object userProgressData)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, copyOptions, null, progressHandler, userProgressData, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Copy(string sourcePath, string destinationPath, CopyOptions copyOptions, CopyMoveProgressRoutine progressHandler, object userProgressData, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, copyOptions, null, progressHandler, userProgressData, null, pathFormat);
      }


      #region Transactional

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, CopyOptions copyOptions)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, copyOptions, null, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, CopyOptions copyOptions, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, copyOptions, null, null, null, null, pathFormat);
      }



      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, CopyOptions copyOptions, CopyMoveProgressRoutine progressHandler, object userProgressData)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, copyOptions, null, progressHandler, userProgressData, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Copies a directory and its contents to a new location, <see cref="CopyOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Copy action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult CopyTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, CopyOptions copyOptions, CopyMoveProgressRoutine progressHandler, object userProgressData, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, copyOptions, null, progressHandler, userProgressData, null, pathFormat);
      }
      
      #endregion // Transactional

      #endregion // Copy (CopyOptions)


      #region Move

      #region .NET

      /// <summary>Moves a file or a directory and its contents to a new location.
      /// <remarks>
      ///   <para>This method does not work across disk volumes.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      [SecurityCritical]
      public static CopyMoveResult Move(string sourcePath, string destinationPath)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, null, MoveOptions.None, null, null, null, PathFormat.RelativePath);
      }

      #endregion // .NET

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location.
      /// <remarks>
      ///   <para>This method does not work across disk volumes.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Move(string sourcePath, string destinationPath, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, null, MoveOptions.None, null, null, null, pathFormat);
      }
      


      #region Transactional

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location.
      /// <remarks>
      ///   <para>This method does not work across disk volumes.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      [SecurityCritical]
      public static CopyMoveResult MoveTransacted(KernelTransaction transaction, string sourcePath, string destinationPath)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, null, MoveOptions.None, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location.
      /// <remarks>
      ///   <para>This method does not work across disk volumes.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult MoveTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, null, MoveOptions.None, null, null, null, pathFormat);
      }
      
      #endregion // Transactional

      #endregion // Move


      #region Move (MoveOptions)

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult Move(string sourcePath, string destinationPath, MoveOptions moveOptions)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, null, moveOptions, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Move(string sourcePath, string destinationPath, MoveOptions moveOptions, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, null, moveOptions, null, null, null, pathFormat);
      }



      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult Move(string sourcePath, string destinationPath, MoveOptions moveOptions, CopyMoveProgressRoutine progressHandler, object userProgressData)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, null, moveOptions, progressHandler, userProgressData, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult Move(string sourcePath, string destinationPath, MoveOptions moveOptions, CopyMoveProgressRoutine progressHandler, object userProgressData, PathFormat pathFormat)
      {
         return CopyMoveCore(null, sourcePath, destinationPath, null, moveOptions, progressHandler, userProgressData, null, pathFormat);
      }


      #region Transactional

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult MoveTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, MoveOptions moveOptions)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, null, moveOptions, null, null, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult MoveTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, MoveOptions moveOptions, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, null, moveOptions, null, null, null, pathFormat);
      }



      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      [SecurityCritical]
      public static CopyMoveResult MoveTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, MoveOptions moveOptions, CopyMoveProgressRoutine progressHandler, object userProgressData)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, null, moveOptions, progressHandler, userProgressData, null, PathFormat.RelativePath);
      }

      /// <summary>[AlphaFS] Moves a file or a directory and its contents to a new location, <see cref="MoveOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <returns>A <see cref="CopyMoveResult"/> class with the status of the Move action.</returns>
      /// <remarks>
      ///   <para>This method does not work across disk volumes unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.CopyAllowed"/>.</para>
      ///   <para>Whenever possible, avoid using short file names (such as XXXXXX~1.XXX) with this method.</para>
      ///   <para>If two directories have equivalent short file names then this method may fail and raise an exception and/or result in undesirable behavior.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with details of the Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the directory has been moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SecurityCritical]
      public static CopyMoveResult MoveTransacted(KernelTransaction transaction, string sourcePath, string destinationPath, MoveOptions moveOptions, CopyMoveProgressRoutine progressHandler, object userProgressData, PathFormat pathFormat)
      {
         return CopyMoveCore(transaction, sourcePath, destinationPath, null, moveOptions, progressHandler, userProgressData, null, pathFormat);
      }

      #endregion // Transactional

      #endregion // Move (MoveOptions)


      #region Internal Methods

      /// <summary>Copy/move a Non-/Transacted file or directory including its children to a new location,
      ///   <see cref="CopyOptions"/> or <see cref="MoveOptions"/> can be specified,
      ///   and the possibility of notifying the application of its progress through a callback function.
      /// <remarks>
      ///   <para>Option <see cref="CopyOptions.NoBuffering"/> is recommended for very large file transfers.</para>
      ///   <para>You cannot use the Move method to overwrite an existing file, unless <paramref name="moveOptions"/> contains <see cref="MoveOptions.ReplaceExisting"/>.</para>
      ///   <para>Note that if you attempt to replace a file by moving a file of the same name into that directory, you get an IOException.</para>
      /// </remarks>
      /// </summary>
      /// <returns>A <see cref="CopyMoveResult"/> class with the status of the Copy or Move action.</returns>
      /// <exception cref="ArgumentException"/>
      /// <exception cref="ArgumentNullException"/>
      /// <exception cref="DirectoryNotFoundException"/>
      /// <exception cref="IOException"/>
      /// <exception cref="NotSupportedException"/>
      /// <exception cref="UnauthorizedAccessException"/>
      /// <param name="transaction">The transaction.</param>
      /// <param name="sourcePath">The source directory path.</param>
      /// <param name="destinationPath">The destination directory path.</param>
      /// <param name="copyOptions"><see cref="CopyOptions"/> that specify how the directory is to be copied. This parameter can be <see langword="null"/>.</param>
      /// <param name="moveOptions"><see cref="MoveOptions"/> that specify how the directory is to be moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="progressHandler">A callback function that is called each time another portion of the file has been copied/moved. This parameter can be <see langword="null"/>.</param>
      /// <param name="userProgressData">The argument to be passed to the callback function. This parameter can be <see langword="null"/>.</param>
      /// <param name="copyMoveResult"></param>
      /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
      [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
      [SecurityCritical]
      internal static CopyMoveResult CopyMoveCore(KernelTransaction transaction, string sourcePath, string destinationPath, CopyOptions? copyOptions, MoveOptions? moveOptions, CopyMoveProgressRoutine progressHandler, object userProgressData, CopyMoveResult copyMoveResult, PathFormat pathFormat)
      {
         #region Setup

         var sourcePathLp = sourcePath;
         var destinationPathLp = destinationPath;
         var skipPathChecks = pathFormat == PathFormat.LongFullPath;


         if (!skipPathChecks)
         {
            Path.CheckSupportedPathFormat(sourcePathLp, true, true);
            Path.CheckSupportedPathFormat(destinationPathLp, true, true);


            // MSDN: .NET 4+ Trailing spaces are removed from the end of the path parameters before moving the directory.
            // TrimEnd() is also applied for AlphaFS implementation of method Directory.Copy(), .NET does not have this method.

            const GetFullPathOptions fullPathOptions = GetFullPathOptions.TrimEnd | GetFullPathOptions.RemoveTrailingDirectorySeparator;

            sourcePathLp = Path.GetExtendedLengthPathCore(transaction, sourcePath, pathFormat, fullPathOptions);
            destinationPathLp = Path.GetExtendedLengthPathCore(transaction, destinationPath, pathFormat, fullPathOptions);


            // MSDN: .NET3.5+: IOException: The sourceDirName and destDirName parameters refer to the same file or directory.
            if (sourcePathLp.Equals(destinationPathLp, StringComparison.OrdinalIgnoreCase))
               NativeError.ThrowException(Win32Errors.ERROR_SAME_DRIVE, destinationPathLp);
         }


         var emulateMove = false;

         // Determine Copy or Move action.
         var isCopy = File.DetermineIsCopy(copyOptions, moveOptions);
         var isMove = !isCopy;

         var cmr = copyMoveResult ?? new CopyMoveResult(sourcePathLp, destinationPathLp, false, (int) Win32Errors.ERROR_SUCCESS);


         // Execute once only.
         if (!skipPathChecks && isMove)
         {
            // Compare the root part of both paths.
            var equalRootPaths = Path.GetPathRoot(sourcePathLp, false).Equals(Path.GetPathRoot(destinationPathLp, false), StringComparison.OrdinalIgnoreCase);

            // Method Volume.IsSameVolume() returns true when both paths refer to the same volume, even if one of the paths is a UNC path.
            // For example, src = C:\TempSrc and dst = \\localhost\C$\TempDst
            var isSameVolume = equalRootPaths || Volume.IsSameVolume(sourcePathLp, destinationPathLp);

            isMove = isSameVolume && equalRootPaths;
            

            if (!isMove)
            {
               // A Move() can be emulated by using Copy() and Delete(), but only if the CopyAllowed flag is set.
               isMove = ((MoveOptions) moveOptions & MoveOptions.CopyAllowed) != 0;

               // MSDN: .NET3.5+: IOException: An attempt was made to move a directory to a different volume.
               if (!isMove)
                  NativeError.ThrowException(Win32Errors.ERROR_NOT_SAME_DEVICE, sourcePathLp, destinationPathLp);
            }


            // The NativeMethod.MoveFileXxx() methods fail when:
            // - A directory is being moved;
            // - One of the paths is a UNC path, even though both paths refer to the same volume.
            //   For example, src = C:\TempSrc and dst = \\localhost\C$\TempDst
            if (isMove)
            {
               var srcIsUncPath = Path.IsUncPathCore(sourcePathLp, false, false);
               var dstIsUncPath = Path.IsUncPathCore(destinationPathLp, false, false);

               isMove = srcIsUncPath && dstIsUncPath;
               if (!isMove)
                  isMove = !srcIsUncPath && !dstIsUncPath;
            }


            isMove = isMove && isSameVolume && equalRootPaths;


            // Emulate Move().
            if (!isMove)
            {
               emulateMove = true;

               moveOptions = null;

               isCopy = true;
               copyOptions = CopyOptions.FailIfExists;
            }
         }
         
         #endregion // Setup


         #region Copy

         if (isCopy)
         {
            CreateDirectoryCore(transaction, destinationPathLp, null, null, false, PathFormat.LongFullPath);

            foreach (var fsei in EnumerateFileSystemEntryInfosCore<FileSystemEntryInfo>(transaction, sourcePathLp, Path.WildcardStarMatchAll, DirectoryEnumerationOptions.FilesAndFolders, PathFormat.LongFullPath))
            {
               var newDestinationPathLp = Path.CombineCore(false, destinationPathLp, fsei.FileName);

               cmr = fsei.IsDirectory
                  ? CopyMoveCore(transaction, fsei.LongFullPath, newDestinationPathLp, copyOptions, moveOptions, progressHandler, userProgressData, cmr, PathFormat.LongFullPath)
                  : File.CopyMoveCore(false, transaction, fsei.LongFullPath, newDestinationPathLp, false, copyOptions, moveOptions, progressHandler, userProgressData, cmr, PathFormat.LongFullPath);


               if (cmr.ErrorCode == Win32Errors.ERROR_SUCCESS)
               {
                  if (fsei.IsDirectory)
                     cmr.TotalFolders++;
                  else
                  {
                     cmr.TotalFiles++;
                     cmr.TotalBytes += fsei.FileSize;
                  }


                  // Remove the folder or file when copying was successful.
                  if (emulateMove)
                  {
                     if (fsei.IsDirectory)
                        DeleteDirectoryCore(fsei, transaction, null, true, true, false, true, PathFormat.LongFullPath);
                     else
                        File.DeleteFileCore(transaction, fsei.LongFullPath, true, PathFormat.LongFullPath);
                  }
               }


               if (cmr.IsCanceled)
                  return cmr;
            }


            // Remove source folder.
            if (emulateMove && cmr.ErrorCode == Win32Errors.ERROR_SUCCESS)
               DeleteDirectoryCore(null, transaction, sourcePathLp, true, true, false, true, PathFormat.LongFullPath);
         }

         #endregion // Copy


         #region Move

         else
         {
            // MoveOptions.ReplaceExisting: This value cannot be used if lpNewFileName or lpExistingFileName names a directory.
            if (((MoveOptions) moveOptions & MoveOptions.ReplaceExisting) != 0)
               DeleteDirectoryCore(null, transaction, destinationPathLp, true, true, false, true, PathFormat.LongFullPath);


            // Moves a file or directory, including its children.
            // Copies an existing directory, including its children to a new directory.
            cmr = File.CopyMoveCore(true, transaction, sourcePathLp, destinationPathLp, false, copyOptions, moveOptions, progressHandler, userProgressData, cmr, PathFormat.LongFullPath);
         }

         #endregion // Move


         return cmr;
      }

      #endregion // Internal Methods
   }
}
