void RunUpdates()
		{
			long sizeEntries = 0;
			long endOfStream = 0;
			bool directUpdate = false;
			long destinationPosition = 0; // NOT SFX friendly

			ZipFile workFile;

			if ( IsNewArchive ) {
				workFile = this;
				workFile.baseStream_.Position = 0;
				directUpdate = true;
			}
			else if ( archiveStorage_.UpdateMode == FileUpdateMode.Direct ) {
				workFile = this;
				workFile.baseStream_.Position = 0;
				directUpdate = true;

				// Sort the updates by offset within copies/modifies, then adds.
				// This ensures that data required by copies will not be overwritten.
				updates_.Sort(new UpdateComparer());
			}
			else {
				workFile = ZipFile.Create(archiveStorage_.GetTemporaryOutput());
				workFile.UseZip64 = UseZip64;
				
				if (key != null) {
					workFile.key = (byte[])key.Clone();
				}
			}

			try {
				foreach ( ZipUpdate update in updates_ ) {
					if (update != null) {
						switch (update.Command) {
							case UpdateCommand.Copy:
								if (directUpdate) {
									CopyEntryDirect(workFile, update, ref destinationPosition);
								}
								else {
									CopyEntry(workFile, update);
								}
								break;

							case UpdateCommand.Modify:
								// TODO: Direct modifying of an entry will take some legwork.
								ModifyEntry(workFile, update);
								break;

							case UpdateCommand.Add:
								if (!IsNewArchive && directUpdate) {
									workFile.baseStream_.Position = destinationPosition;
								}

								AddEntry(workFile, update);

								if (directUpdate) {
									destinationPosition = workFile.baseStream_.Position;
								}
								break;
						}
					}
				}

				if ( !IsNewArchive && directUpdate ) {
					workFile.baseStream_.Position = destinationPosition;
				}

				long centralDirOffset = workFile.baseStream_.Position;

				foreach ( ZipUpdate update in updates_ ) {
					if (update != null) {
						sizeEntries += workFile.WriteCentralDirectoryHeader(update.OutEntry);
					}
				}

				byte[] theComment = (newComment_ != null) ? newComment_.RawComment : ZipConstants.ConvertToArray(comment_);
				using ( ZipHelperStream zhs = new ZipHelperStream(workFile.baseStream_) ) {
					zhs.WriteEndOfCentralDirectory(updateCount_, sizeEntries, centralDirOffset, theComment);
				}

				endOfStream = workFile.baseStream_.Position;

				// And now patch entries...
				foreach ( ZipUpdate update in updates_ ) {
					if (update != null)
					{
						// If the size of the entry is zero leave the crc as 0 as well.
						// The calculated crc will be all bits on...
						if ((update.CrcPatchOffset > 0) && (update.OutEntry.CompressedSize > 0)) {
							workFile.baseStream_.Position = update.CrcPatchOffset;
							workFile.WriteLEInt((int)update.OutEntry.Crc);
						}

						if (update.SizePatchOffset > 0) {
							workFile.baseStream_.Position = update.SizePatchOffset;
							if (update.OutEntry.LocalHeaderRequiresZip64) {
								workFile.WriteLeLong(update.OutEntry.Size);
								workFile.WriteLeLong(update.OutEntry.CompressedSize);
							}
							else {
								workFile.WriteLEInt((int)update.OutEntry.CompressedSize);
								workFile.WriteLEInt((int)update.OutEntry.Size);
							}
						}
					}
				}
			}
			catch {
				workFile.Close();
				if (!directUpdate && (workFile.Name != null)) {
					File.Delete(workFile.Name);
				}
				throw;
			}

			if (directUpdate) {
				workFile.baseStream_.SetLength(endOfStream);
				workFile.baseStream_.Flush();
				isNewArchive_ = false;
				ReadEntries();
			}
			else {
				baseStream_.Close();
				Reopen(archiveStorage_.ConvertTemporaryToFinal());
			}
		}
		/// <summary>
		/// Finishes the stream.  This will write the central directory at the
		/// end of the zip file and flush the stream.
		/// </summary>
		/// <remarks>
		/// This is automatically called when the stream is closed.
		/// </remarks>
		/// <exception cref="System.IO.IOException">
		/// An I/O error occurs.
		/// </exception>
		/// <exception cref="ZipException">
		/// Comment exceeds the maximum length<br/>
		/// Entry name exceeds the maximum length
		/// </exception>
		public override void Finish()
		{
			if (entries == null)  {
				return;
			}
			
			if (curEntry != null) {
				CloseEntry();
			}
			
			long numEntries = entries.Count;
			long sizeEntries = 0;
			
			foreach (ZipEntry entry in entries) {
				WriteLeInt(ZipConstants.CentralHeaderSignature); 
				WriteLeShort(ZipConstants.VersionMadeBy);
				WriteLeShort(entry.Version);
				WriteLeShort(entry.Flags);
				WriteLeShort((short)entry.CompressionMethodForHeader);
				WriteLeInt((int)entry.DosTime);
				WriteLeInt((int)entry.Crc);

				if ( entry.IsZip64Forced() || 
					(entry.CompressedSize >= uint.MaxValue) )
				{
					WriteLeInt(-1);
				}
				else {
					WriteLeInt((int)entry.CompressedSize);
				}

				if ( entry.IsZip64Forced() ||
					(entry.Size >= uint.MaxValue) )
				{
					WriteLeInt(-1);
				}
				else {
					WriteLeInt((int)entry.Size);
				}

				byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
				
				if (name.Length > 0xffff) {
					throw new ZipException("Name too long.");
				}
				
				ZipExtraData ed = new ZipExtraData(entry.ExtraData);

				if ( entry.CentralHeaderRequiresZip64 ) {
					ed.StartNewEntry();
					if ( entry.IsZip64Forced() ||
						(entry.Size >= 0xffffffff) )
					{
						ed.AddLeLong(entry.Size);
					}

					if ( entry.IsZip64Forced() ||
						(entry.CompressedSize >= 0xffffffff) )
					{
						ed.AddLeLong(entry.CompressedSize);
					}

					if ( entry.Offset >= 0xffffffff )
					{
						ed.AddLeLong(entry.Offset);
					}

					ed.AddNewEntry(1);
				}
				else {
					ed.Delete(1);
				}

#if !NET_1_1 && !NETCF_2_0
				if (entry.AESKeySize > 0) {
					AddExtraDataAES(entry, ed);
				}
#endif
				byte[] extra = ed.GetEntryData();
				
				byte[] entryComment = 
					(entry.Comment != null) ? 
					ZipConstants.ConvertToArray(entry.Flags, entry.Comment) :
					new byte[0];

				if (entryComment.Length > 0xffff) {
					throw new ZipException("Comment too long.");
				}
				
				WriteLeShort(name.Length);
				WriteLeShort(extra.Length);
				WriteLeShort(entryComment.Length);
				WriteLeShort(0);	// disk number
				WriteLeShort(0);	// internal file attributes
									// external file attributes

				if (entry.ExternalFileAttributes != -1) {
					WriteLeInt(entry.ExternalFileAttributes);
				} else {
					if (entry.IsDirectory) {                         // mark entry as directory (from nikolam.AT.perfectinfo.com)
						WriteLeInt(16);
					} else {
						WriteLeInt(0);
					}
				}

				if ( entry.Offset >= uint.MaxValue ) {
					WriteLeInt(-1);
				}
				else {
					WriteLeInt((int)entry.Offset);
				}
				
				if ( name.Length > 0 ) {
					baseOutputStream_.Write(name,    0, name.Length);
				}

				if ( extra.Length > 0 ) {
					baseOutputStream_.Write(extra,   0, extra.Length);
				}

				if ( entryComment.Length > 0 ) {
					baseOutputStream_.Write(entryComment, 0, entryComment.Length);
				}

				sizeEntries += ZipConstants.CentralHeaderBaseSize + name.Length + extra.Length + entryComment.Length;
			}
			
			using ( ZipHelperStream zhs = new ZipHelperStream(baseOutputStream_) ) {
				zhs.WriteEndOfCentralDirectory(numEntries, sizeEntries, offset, zipComment);
			}

			entries = null;
		}
		/// <summary>
		/// Commit current updates, updating this archive.
		/// </summary>
		/// <seealso cref="BeginUpdate()"></seealso>
		/// <seealso cref="AbortUpdate"></seealso>
		/// <exception cref="ObjectDisposedException">ZipFile has been closed.</exception>
		public void CommitUpdate()
		{
			if ( isDisposed_ ) {
				throw new ObjectDisposedException("ZipFile");
			}
			
			CheckUpdating();

			try {
				updateIndex_.Clear();
				updateIndex_=null;

				if( contentsEdited_ ) {
					RunUpdates();
				}
				else if( commentEdited_ ) {
					UpdateCommentOnly();
				}
				else {
					// Create an empty archive if none existed originally.
					if( entries_.Length==0 ) {
						byte[] theComment=(newComment_!=null)?newComment_.RawComment:ZipConstants.ConvertToArray(comment_);
						using( ZipHelperStream zhs=new ZipHelperStream(baseStream_) ) {
							zhs.WriteEndOfCentralDirectory(0, 0, 0, theComment);
						}
					}
				}

			}
			finally {
				PostUpdateCleanup();
			}
		}