public static byte[] CompressMyObject(Map obj) 
        { 
            try 
            { 
                using (MemoryStream output = new MemoryStream()) 
                { 
                    using (GZipStream zipStream = new GZipStream(output, CompressionMode.Compress)) 
                    {
                        BinaryFormatter formatter = new BinaryFormatter(); 
                        formatter.Serialize(zipStream, obj); 
                    } 
                    
                    return output.ToArray(); 
                } 
            } 
            catch (Exception) 
            { 
                return null; 
            } 
        }

        public static Map DecompressMyObject(byte[] input) 
        { 
            try 
            { 
                using (MemoryStream output = new MemoryStream(input)) 
                { 
                    using (GZipStream zipStream = new GZipStream(output, CompressionMode.Decompress)) 
                    { 
                        BinaryFormatter formatter = new BinaryFormatter(); 
                        return (formatter.Deserialize(zipStream) as Map); 
                    } 
                } 
            } 
            catch (Exception) 
            { 
                return null; 
            } 
        }

        public static void Serialize(string url)
        {
            try
            {
                byte[] byteMap = CompressMyObject(myMap);
                Stream stream = File.Open(url, FileMode.Create);
                BinaryFormatter bFormatter = new BinaryFormatter();

                bFormatter.Serialize(stream, byteMap);
                stream.Close();
                bFormatter = null;
                
            }
            catch (InvalidOperationException e)
            {
                MessageBox.Show(e.ToString());
            }
        }

        public static void Deserialize(string url)
        {
            try
            {
                byte[] byteMap;
                Stream stream = File.Open(url, FileMode.Open);
                BinaryFormatter bFormatter = new BinaryFormatter();

                byteMap = (byte[])bFormatter.Deserialize(stream);
                myMap = DecompressMyObject(byteMap);
                stream.Close();
                bFormatter = null;

                myMap.ResetMap();
                UpdateCheckList();
            }
            catch (InvalidOperationException e)
            {
                MessageBox.Show(e.ToString());
            }
        }