Reader of SWF Header File in Pure C#

   /* Not using below case as i not able to dispose the swfReader object which can result in unnecessary memory*/
 
   // Create a swf stream reader
   SwfReader swfReader = new SwfReader(path);
   // Read the completed swf file
   Swf swf = swfReader.ReadSwf();
   // Read only headers of file to optimize read speed
   //Swf swf = swfReader.ReadSwfHeader();
   int swfHeight = swf.Header.Height;
   int swfWidth = swf.Header.Width;
   swfReader.Close();
   if ((swfHeight > int.Parse(hdnBannerHeight.Value)) || (swfWidth > int.Parse(hdnBannerWidth.Value)))
   {
       lblImageUploadMessage1.Text = "File cant be upload as it has invalid dimensions";
       lblImageUploadMessage1.CssClass = "lblErrorMSG";
       Session["bannerImage"] = null;
       if (System.IO.File.Exists(path)) { System.IO.File.Delete(path); }
   }

    private int m_Duration = 0;
    internal int Duration {
      get { return m_Duration; }
    }
 
    private void ReadDuration() {
      //Dauer des Videos ermitteln
      int int32ByteSize = 4;
      byte[] bytes = new byte[int32ByteSize];
      for (int i = 0; i < int32ByteSize; i++) {
        bytes[i] = GetNextByte();
      }
 
      m_Duration = ByteArrayToInt32(bytes, true);
    }
 
    private static Int32 ByteArrayToInt32(byte[] bytes, bool readInReverse = false) {
      // Check if has 4 Bytes
      if (bytes.Length != 4) { throw new Exception("bytes must be exactly 4 in Length"); }
      if (readInReverse) { Array.Reverse(bytes); }
      return BitConverter.ToInt32(bytes, 0);
    }

  private TimeSpan m_DurationSpan = new TimeSpan(m_Duration)

FileStream fs = File.OpenRead(fileName);
data = new byte[100];
fs.Read(data, 0, 100);
fs.Close();