Program.cs

using SudokuSolver.Strategies;
using SudokuSolver.Workers;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SudokuSolver
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                SudokuMapper sudokuMapper = new SudokuMapper();
                SudokuBoardStateManager sudokuBoardStateManager = new SudokuBoardStateManager();
                SudokuSolverEngine sudokuSolverEngine = new SudokuSolverEngine(sudokuBoardStateManager, sudokuMapper);
                SudokuFileReader sudokuFileReader = new SudokuFileReader();
                SudokuBoardDisplayer sudokuBoardDisplayer = new SudokuBoardDisplayer();

                Console.WriteLine("Enter the filename of sudoku puzzle: ");
                var filename = Console.ReadLine();

                var sudokuBoard = sudokuFileReader.ReadFile(filename);
                sudokuBoardDisplayer.Display("Initial state", sudokuBoard);

                bool isSudokuSolved = sudokuSolverEngine.Solve(sudokuBoard);
                sudokuBoardDisplayer.Display("Final state", sudokuBoard);

                Console.WriteLine(isSudokuSolved ? "Sudoku puzzle is solved!" : "This program is not able to solve sudoku puzzle");
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine("{0} {1}", "Sudoku cannot be solved: ", ex.Message);
                Console.ReadLine();

            }
        }
    }
}