C#文件操作

public static void Compress(string sourceFile, string destFile)
        {
            FileStream fs = File.OpenRead(sourceFile);
            byte[] bs = new byte[fs.Length];
            fs.Read(bs, 0, bs.Length);
            fs.Close();

            FileStream fd = File.Create(destFile);
            GZipStream gs = new GZipStream(fd, CompressionMode.Compress);
            //DeflateStream ds = new DeflateStream(fs, CompressionMode.Compress);
            gs.Write(bs, 0, bs.Length);
            gs.Close();
            fd.Close();

        }

        public static void Decompress(string sourceFile, string destFile)
        {
            FileStream fs = File.OpenRead(sourceFile);
            FileStream fd = File.Create(destFile);
            GZipStream gs = new GZipStream(fs, CompressionMode.Decompress);
            //byte[] bs = new byte[gs.Length];
            //gs.Read(bs, 0, bs.Length);
            //gs.Close();
            //fs.Close();
            //fd.Write(bs, 0, bs.Length);
            //fd.Flush();
            //fd.Close();
            int b = gs.ReadByte();
            while (b != -1)
            {
                fd.WriteByte((byte)b);
                b = gs.ReadByte();
            }
            fd.Flush();
            fd.Close();
            gs.Close();
            fs.Close();

        }

单文件压缩与解压