KDE-Forum.org

Source code

            FileStream fs = new FileStream((map.path, 
                 FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite); 
 
             BinaryReader br = new BinaryReader(fs); 
             BinaryWriter bw = new BinaryWriter(fs); 
 
             int sig = 0; 
             long length = br.BaseStream.Length; 
 
             br.BaseStream.Position = 2048; 
 
             for (long i = 2048; i < length; i += 4) 
                 sig ^= br.ReadInt32(); 
 
             bw.BaseStream.Position = 720; 
             bw.Write(sig); 
 
             br.Close(); 
             bw.Close();