Hello I'm new to this and I'd love some help here ,could anyone show me how to check if input is string so it doesn't crash if I enter a let's say a number instead. and other improvements are welcome as well. A big piece of the code is below, thanks in advance!

        string[] wordBank = { "Red","Orange","Blue", "Black", "Yellow", "Orange", "Green", "Purple" };
        string wordToGuess = wordBank[random.Next(0, wordBank.Length)];
        string wordToGuessUppercase = wordToGuess.ToUpper();

        StringBuilder displayToPlayer = new StringBuilder(wordToGuess.Length);
        for (int i = 0; i < wordToGuess.Length; i++)
            displayToPlayer.Append('_');

        List<char> correctGuesses = new List<char>();
        List<char> incorrectGuesses = new List<char>();

        int lives = 5;
        bool won = false;
        int lettersRevealed = 0;
        string input;
        char guess;

        while (!won && lives > 0)
            {
            Console.Write("Guess a letter: ");

            input = Console.ReadLine().ToUpper();




            guess = input[0];

            if (correctGuesses.Contains(guess))
            {
                Console.WriteLine("You've already tried '{0}', and it was correct!", guess);
                continue;
            }
            else if (incorrectGuesses.Contains(guess))
            {
                Console.WriteLine("You've already tried '{0}', and it was wrong!", guess);
                continue;
                 }

            if (wordToGuessUppercase.Contains(guess)) 
            {
                correctGuesses.Add(guess);
                for (int i = 0; i < wordToGuess.Length; i++) 
                {
                    if (wordToGuessUppercase[i] == guess)
                    {
                        displayToPlayer[i] = wordToGuess[i];
                        lettersRevealed++;
                    }
                }

                if (lettersRevealed == wordToGuess.Length)
                    won = true;
            }
            else 
            {
                incorrectGuesses.Add(guess);

                Console.WriteLine("Nope, there's no '{0}' in the word!", guess);
                lives--;
            }

                Console.WriteLine(displayToPlayer.ToString());
        }

        if (won)
        {

            Console.WriteLine("You won!"); 
            Console.WriteLine("Congratz! ");
        }
        else
        {
            Console.WriteLine("You lost! It was '{0}'", wordToGuess);
        }
        DateTime myValue = DateTime.Now;
        Console.WriteLine(myValue.ToString());
        Console.Write("Want to play again? press 0 to continue and another random number to exit!");
        p = Convert.ToInt16(Console.ReadLine());
        }
        Console.ReadLine();
    }
}

Edited 1 Year Ago by Derorim: Not clear enough

I want to have it check the input so it doesn't crash if I enter a number instead of a letter.
Thanks

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