static void Main(string[] args) { Console.WriteLine("Hello, Welcome to TicTacToeGame"); TicTacToe t = new TicTacToe(); char[] board = t.CreateBoard(); char pLetter = t.ChooseLetter(); char cLetter = 'X'; if (pLetter.Equals('X')) { cLetter = 'O'; } Console.WriteLine("Player's Letter = " + pLetter); Console.WriteLine("Computer's Letter = " + cLetter); t.PrintBoard(board); bool playVal = true; while (playVal) { Console.WriteLine("Choose a position among 1 to 9"); int choice = Convert.ToInt32(Console.ReadLine()); bool check_if_empty = t.check_Availability(board, choice); if (check_if_empty == false) { Console.WriteLine("The position you chose is full, Please choose another position"); } else { board[choice] = pLetter; t.PrintBoard(board); } } }