using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.IO;
using?SevenZip;

namespace?Demo7zApi
{
????class?Program
????{
????????public?static?void?Zip（Stream?inStream?Stream?outStream）
????????{
????????????bool?dictionaryIsDefined?=?false;
????????????Int32?dictionary?=?1?<
????????????if?（!dictionaryIsDefined）
????????????????dictionary?=?1?<
????????????Int32?posStateBits?=?2;
????????????Int32?litContextBits?=?3;?//?for?normal?files
????????????//?UInt32?litContextBits?=?0;?//?for?32-bit?data
????????????Int32?litPosBits?=?0;
????????????//?UInt32?litPosBits?=?2;?//?for?32-bit?data
????????????Int32?algorithm?=?2;
????????????Int32?numFastBytes?=?128;
????????????string?mf?=?“bt4“;
????????????bool?eos?=?false;

????????????CoderPropID[]?propIDs?=?
				{
					CoderPropID.DictionarySize
					CoderPropID.PosStateBits
					CoderPropID.LitContextBits
					CoderPropID.LitPosBits
					CoderPropID.Algorithm
					CoderPropID.NumFastBytes
					CoderPropID.MatchFinder
					CoderPropID.EndMarker
				};
????????????object[]?properties?=?
				{
					（Int32）（dictionary）
					（Int32）（posStateBits）
					（Int32）（litContextBits）
					（Int32）（litPosBits）
					（Int32）（algorithm）
					（Int32）（numFastBytes）
					mf
					eos
				};

????????????SevenZip.Compression.LZMA.Encoder?encoder?=?new?SevenZip.Compression.LZMA.Encoder（）;
????????????encoder.SetCoderProperties（propIDs?properties）;
????????????encoder.WriteCoderProperties（outStream）;
????????????Int64?fileSize;

????????????fileSize?=?inStream.Length;
????????????for?（int?i?=?0;?i?????????????????outStream.WriteByte（（Byte）（fileSize?>>?（8?*?i）））;

????????????encoder.Code（inStream?outStream?-1?-1?null）;
????????}


????????public?static?void?Unzip（Stream?inStream?Stream?outStream）
????????{
????????????byte[]?properties?=?new?byte[5];
????????????if?（inStream.Read（properties?0?5）?!=?5）
????????????????throw?（new?Exception（“input?.lzma?is?too?short“））;
????????????SevenZip.Compression.LZMA.Decoder?decoder?=?new?SevenZip.Compression.LZMA.Decoder（）;
????????????decoder.SetDecoderProperties（properties）;

????????????long?outSize?=?0;
????????????for?（int?i?=?0;?i?????????????{
????????????????int?v?=?inStream.ReadByte（）;
????????????????if?（v?????????????????????throw?（new?Exception（“Can‘t?Read?1“））;
????????????????outSize?|=?（（long）（byte）v）?<????????????}
????????????long?compressedSize?=?inStream.Length?-?inStream.Position;
????????????decoder.Code（inStream?outStream?compressedSize?outSize?null）;
????????}

????????static?int?Main（string[]?args）
????????{
????????????try
????????????{
????????????????byte[]?bytes?=?new?byte[100000];
????????????????for?（byte?i?=?0;?i?????????????????{
????????????????????for?（int?j?=?0;?j?????????????????????{
????????????????????????bytes[i?*