Data stream compression code

Using system; using system. collections. generic; using system. text; using system. io; using system. io. compression; namespace commonutility. compressionutility {public class compressionutility {// <summary> // read bytes from the data stream /// </Summary> /// <Param name = "stream"> </Param >/// <returns> </returns> Public static byte [] readstreamtobytes (Stream) {byte [] buffer = new byte [64*1024]; memorystream MS = new memorystream (); int r = 0; int L = 0; long position =-1; if (stream. canseek) {position = stream. position; stream. position = 0;} while (true) {r = stream. read (buffer, 0, buffer. length); If (r> 0) {L + = r; Ms. write (buffer, 0, R) ;}else {break ;}} byte [] bytes = new byte [l]; Ms. position = 0; Ms. read (bytes, 0, (INT) L); Ms. close (); MS = NULL; If (position> = 0) {stream. position = position;} return bytes;} // <summary> // Gzip algorithm Compress data /// </Summary> /// <Param name = "data"> </param> /// <returns> </returns> Public static byte [] gzipcompress (byte [] data) {memorystream MS = new memorystream (); gzipstream stream = new gzipstream (MS, compressionmode. compress, true); stream. write (data, 0, Data. length); stream. close (); stream. dispose (); stream = NULL; byte [] buffer = readstreamtobytes (MS); Ms. close (); Ms. dispose (); MS = NULL; return buffer ;} /// <summary> /// decompress the data using the gzip algorithm /// </Summary> /// <Param name = "data"> </param> /// <returns> </returns> Public static byte [] gzipdecompress (byte [] data) {memorystream MS = new memorystream (data); gzipstream stream = new gzipstream (MS, compressionmode. decompress); byte [] buffer = readstreamtobytes (Stream); Ms. close (); Ms. dispose (); MS = NULL; stream. close (); stream. dispose (); stream = NULL; return buffer ;} /// <summary> /// deflate algorithm compresses data /// </Summary> /// <Param name = "data"> </param> // <returns> </returns> Public static byte [] deflatecompress (byte [] data) {memorystream MS = new memorystream (); deflatestream stream = new deflatestream (MS, compressionmode. compress, true); stream. write (data, 0, Data. length); stream. close (); stream. dispose (); stream = NULL; byte [] buffer = readstreamtobytes (MS); Ms. close (); Ms. dispose (); MS = NULL; return buffer ;} /// <summary> /// decompress the data using the deflate algorithm /// </Summary> /// <Param name = "data"> </param> /// <returns> </returns> Public static byte [] deflatedecompress (byte [] data) {memorystream MS = new memorystream (data); deflatestream stream = new deflatestream (MS, compressionmode. decompress); byte [] buffer = readstreamtobytes (Stream); Ms. close (); Ms. dispose (); MS = NULL; stream. close (); stream. dispose (); stream = NULL; return buffer ;}}}