i cant read the binary header in the segy files.

public void ReadBinaryHeader()
        {
                        SeismicLog.WriteLog(DateTime.Now + "Reading Binary Header.");

            int sampleInterval = 0; //sample interval in microseconds 


            int dataSampleFormat = 0;

                              if (countNoOfBytes < 3600)
            {
                               inputSegyFileStream.Seek(16, SeekOrigin.Current);
                countNoOfBytes = countNoOfBytes + (16);


                byteOutputOfReader = segyReader.ReadByte();
                sampleInterval = sampleInterval + (byteOutputOfReader * 256);
                countNoOfBytes++;
                byteOutputOfReader = segyReader.ReadByte();
                sampleInterval = sampleInterval + (byteOutputOfReader);
                countNoOfBytes++;


              
                inputSegyFileStream.Seek(2, SeekOrigin.Current);
                countNoOfBytes = countNoOfBytes + (2);



                byteOutputOfReader = segyReader.ReadByte();
                noOfsamplesperDataTrace = noOfsamplesperDataTrace + (byteOutputOfReader * 256);
                countNoOfBytes++;
                byteOutputOfReader = segyReader.ReadByte();
                noOfsamplesperDataTrace = noOfsamplesperDataTrace + byteOutputOfReader;
                countNoOfBytes++;


                
                inputSegyFileStream.Seek(2, SeekOrigin.Current);
                countNoOfBytes = countNoOfBytes + (2);


                byteOutputOfReader = segyReader.ReadByte();
                dataSampleFormat = dataSampleFormat + (byteOutputOfReader * 256);
                countNoOfBytes++;
                byteOutputOfReader = segyReader.ReadByte();
                dataSampleFormat = dataSampleFormat + byteOutputOfReader;
                countNoOfBytes++;


                if (dataSampleFormat == 1 | dataSampleFormat == 2 | dataSampleFormat == 4 | dataSampleFormat == 5)
                {
                    multiplierTrace = 4;
                }
                else if (dataSampleFormat == 3)
                {
                    multiplierTrace = 2;
                }
                else if (dataSampleFormat == 8)
                {
                    multiplierTrace = 1;
                }

                inputSegyFileStream.Seek(278, SeekOrigin.Current);
                countNoOfBytes = countNoOfBytes + (278);



                byteOutputOfReader = segyReader.ReadByte();
                noOfExtendedTexHeaders = noOfExtendedTexHeaders + (byteOutputOfReader * 256);
                countNoOfBytes++;
                byteOutputOfReader = segyReader.ReadByte();
                noOfExtendedTexHeaders = noOfExtendedTexHeaders + byteOutputOfReader;
                countNoOfBytes--;
                inputSegyFileStream.Seek(94, SeekOrigin.Current);
                countNoOfBytes = countNoOfBytes + (94);

                SeismicLog.WriteLog(DateTime.Now + "End of Binary Header.");

                //This is a loop where we are skipping Extended Textual Headers if present in SEGY
                if (noOfExtendedTexHeaders > 0)
                {
                    for (int NoOfExtTextHeader = 0; NoOfExtTextHeader < noOfExtendedTexHeaders; NoOfExtTextHeader++)
                    {
                        inputSegyFileStream.Seek(3200, SeekOrigin.Current);
                        countNoOfBytes = countNoOfBytes + (3200);
                    }
                }
            }
          
           }


        }