Read mp4 metadata [Solved]

After a lot of time wasted, I finally have a solution to retrieve the value of MajorBrand from Mp4 video. I am sharing my solution here, hope it will be able to help other people

 FileStream fileStream = new FileStream( filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite );
 
 BinaryReader binaryReader = new BinaryReader( fileStream );
 binaryReader.BaseStream.Seek( 0, SeekOrigin.Begin );
 byte[] verifyArray = binaryReader.ReadBytes( 32 );
 binaryReader.Close();

 ConvertToString( BitConverter.ToString( verifyArray ) );
 
 private void ConvertToString( string hex )
 {
      StringBuilder builder = new StringBuilder();

      string[] splitHex = hex.Split( new char[] { '-' } );
      for (int i = 0; i < splitHex.Length; i++)
      {
           int value = Convert.ToInt32( splitHex[i], 16 );
           string stringValue = char.ConvertFromUtf32( value );
           char charValue = (char)value;
           if( value != 0 )
              builder.Append( stringValue );
      }
 }