public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
			{
				command_ = UpdateCommand.Add;
				entry_ = new ZipEntry(entryName);
				entry_.CompressionMethod = compressionMethod;
#if FORCE_ZIP64
				entry_.ForceZip64();
#endif
				dataSource_ = dataSource;
			}

		/// <summary>
		/// Add a file entry with data.
		/// </summary>
		/// <param name="dataSource">The source of the data for this entry.</param>
		/// <param name="entryName">The name to give to the entry.</param>
		/// <param name="compressionMethod">The compression method to use.</param>
		public void Add( IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod ) {
			if( dataSource == null ) {
				throw new ArgumentNullException( "dataSource" );
			}

			if( entryName == null ) {
				throw new ArgumentNullException( "entryName" );
			}

			CheckUpdating();

			BlubbZipEntry entry = EntryFactory.MakeFileEntry( entryName, false );
			entry.CompressionMethod = compressionMethod;

			AddUpdate( new BlubbUpdate( dataSource, entry ) );
		}

        /// <summary>
        /// Add a file entry with data.
        /// </summary>
        /// <param name="dataSource">The source of the data for this entry.</param>
        /// <param name="entryName">The name to give to the entry.</param>
        /// <param name="compressionMethod">The compression method to use.</param>
        /// <param name="useUnicodeText">Ensure Unicode text is used for name and comments for this entry.</param>
        public void Add(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod, bool useUnicodeText)
        {
            if (dataSource == null)
            {
                throw new ArgumentNullException("dataSource");
            }

            CheckUpdating();
            contentsEdited_ = true;
            ZipUpdate update = new ZipUpdate(dataSource, GetTransformedFileName(entryName),
                                       compressionMethod);
            update.Entry.IsUnicodeText = useUnicodeText;
            updates_.Add(update);
        }

		/// <summary>
		/// Add a file entry with data.
		/// </summary>
		/// <param name="dataSource">The source of the data for this entry.</param>
		/// <param name="entryName">The name to give to the entry.</param>
		public void Add(IStaticDataSource dataSource, string entryName)
		{
			if ( dataSource == null ) {
				throw new ArgumentNullException("dataSource");
			}

			CheckUpdating();
			contentsEdited_ = true;
			updates_.Add(new ZipUpdate(dataSource, entryName, CompressionMethod.Deflated));
		}

 public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
 {
     _sizePatchOffset = -1L;
     _crcPatchOffset = -1L;
     _offsetBasedSize = -1L;
     _command = UpdateCommand.Add;
     _entry = new ZipEntry(entryName);
     _entry.CompressionMethod = compressionMethod;
     _dataSource = dataSource;
 }

 public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
 {
     sizePatchOffset_ = -1L;
     crcPatchOffset_ = -1L;
     _offsetBasedSize = -1L;
     command_ = UpdateCommand.Add;
     entry_ = new ZipEntry(entryName);
     entry_.CompressionMethod = compressionMethod;
     dataSource_ = dataSource;
 }

			public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
			{
				command_ = UpdateCommand.Add;
				entry_ = new ZipEntry(entryName);
				entry_.CompressionMethod = compressionMethod;
				dataSource_ = dataSource;
			}

 public HfsUpdate(IStaticDataSource dataSource, HfsEntry entry)
 {
     command_ = UpdateCommand.Add;
     entry_ = entry;
     dataSource_ = dataSource;
 }

        /// <summary>
        /// Add a file entry with data.
        /// </summary>
        /// <param name="dataSource">The source of the data for this entry.</param>
        /// <param name="entry">The entry to add.</param>
        public void Add(IStaticDataSource dataSource, ZipEntry entry)
        {
            if (dataSource == null)
            {
                throw new ArgumentNullException("dataSource");
            }

            if (entry == null)
            {
                throw new ArgumentNullException("entry");
            }

            CheckUpdating();

            AddUpdate(new ZipUpdate(dataSource, entry));
        }

 public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
 {
     this.sizePatchOffset_ = -1L;
     this.crcPatchOffset_ = -1L;
     this._offsetBasedSize = -1L;
     this.command_ = ZipFile.UpdateCommand.Add;
     this.entry_ = new ZipEntry(entryName);
     this.entry_.CompressionMethod = compressionMethod;
     this.dataSource_ = dataSource;
 }

		/// <summary>
		/// Add a file entry with data.
		/// </summary>
		/// <param name="dataSource">The source of the data for this entry.</param>
		/// <param name="entryName">The name to give to the entry.</param>
		public void Add(IStaticDataSource dataSource, string entryName)
		{
			if ( dataSource == null ) {
				throw new ArgumentNullException("dataSource");
			}

			if ( entryName == null ) {
				throw new ArgumentNullException("entryName");
			}

			CheckUpdating();
			AddUpdate(new ZipUpdate(dataSource, EntryFactory.MakeFileEntry(entryName, false)));
		}

			public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
			{
				_command = UpdateCommand.Add;
				_entry = new ZipEntry(entryName);
				_entry.CompressionMethod = compressionMethod;
				_dataSource = dataSource;
			}