public Matrix()
{
// disable once ConvertClosureToMethodGroup
SquareArray.Sudoku.IterateTwo((int r, int c) =>
{
matrix[r, c] = new StateSpace(
() => changeObserver(),
() => invalidStateObserver());
});
}
public StateSpace(StateSpace origin, Action changeObserver = null, Action invalidState = null)
{
bits = new BitArray(origin.bits);
this.changeObserver = changeObserver;
this.invalidState = invalidState;
}