void AutoGenerate()
{
string folder = @"C:\Users\savag\OneDrive\Documents\Sudoku\Auto";
int n = 0;
while (!stopped)
{
//g.Generate(new HintSelections(HintSelections.Level.Extreme));
grid.Generate(null);
HintSelections.Level?level;
SolveResult solns;
grid.RateDifficulty(out level, out solns);
string difficulty = (level == null) ? "Impossible" : level.ToString();
string[] lines = grid.GridStrings();
string fileName = desc + " " + difficulty + " " + (n++) + ".sud";
File.WriteAllLines(Path.Combine(folder, fileName), lines);
}
finished.Set();
}