// button function which opens file dialog, and loads csv into game
        public void LoadCsvFromFile()
        {
            DialogResult result = OpenDialog.ShowDialog();

            if (result == DialogResult.OK)
            {
                string file = OpenDialog.FileName;
                try
                {
                    string contents = File.ReadAllText(file);
                    originalBoard = File.ReadAllText(file);
                    TheSudoku.FromCSV(contents);
                }
                catch (IOException)
                {
                }
            }
        }