C#对byte数组压缩和解压

直接上代码

public class ByteHelper    {        public const ushort COMPRESSION_FORMAT_LZNT1 = 2;        public const ushort COMPRESSION_ENGINE_MAXIMUM = 0x100;        [DllImport("ntdll.dll")]        public static extern uint RtlGetCompressionWorkSpaceSize(ushort dCompressionFormat, out uint dNeededBufferSize, out uint dUnknown);        [DllImport("ntdll.dll")]        public static extern uint RtlCompressBuffer(ushort dCompressionFormat, byte[] dSourceBuffer, int dSourceBufferLength, byte[] dDestinationBuffer,        int dDestinationBufferLength, uint dUnknown, out int dDestinationSize, IntPtr dWorkspaceBuffer);        [DllImport("ntdll.dll")]        public static extern uint RtlDecompressBuffer(ushort dCompressionFormat, byte[] dDestinationBuffer, int dDestinationBufferLength, byte[] dSourceBuffer, int dSourceBufferLength, out uint dDestinationSize);        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]        public static extern IntPtr LocalAlloc(int uFlags, IntPtr sizetdwBytes);        [DllImport("kernel32.dll", SetLastError = true)]        public static extern IntPtr LocalFree(IntPtr hMem);        public static byte[] Decompress(byte[] buffer)        {            var outBuf = new byte[buffer.Length * 6];            uint dwSize = 0, dwRet = 0;            uint ret = RtlGetCompressionWorkSpaceSize(COMPRESSION_FORMAT_LZNT1, out dwSize, out dwRet);            if (ret != 0) return null;            ret = RtlDecompressBuffer(COMPRESSION_FORMAT_LZNT1, outBuf, outBuf.Length, buffer, buffer.Length, out dwRet);            if (ret != 0) return null;            Array.Resize(ref outBuf, (Int32)dwRet);            return outBuf;        }        public static byte[] Compress(byte[] buffer)        {            var outBuf = new byte[buffer.Length * 6];            uint dwSize = 0, dwRet = 0;            uint ret = RtlGetCompressionWorkSpaceSize(COMPRESSION_FORMAT_LZNT1 | COMPRESSION_ENGINE_MAXIMUM, out dwSize, out dwRet);            if (ret != 0) return null;            int dstSize = 0;            IntPtr hWork = LocalAlloc(0, new IntPtr(dwSize));            ret = RtlCompressBuffer(COMPRESSION_FORMAT_LZNT1 | COMPRESSION_ENGINE_MAXIMUM, buffer, buffer.Length, outBuf, outBuf.Length, 0, out dstSize, hWork);            if (ret != 0) return null;            LocalFree(hWork);            Array.Resize(ref outBuf, dstSize);            return outBuf;        }    }