string[] cells = new string[]{"1","2","3","4","5","6","7","8","9"};

string[] cells = new string[]{"1","2","3","4","5","6","7","8","9"};

if(int.TryParse(Console.ReadLine(), out int cell)
{

Console.WriteLine($"Wow! your cell is {cell} and value in your cell is{cells[cell]}");
}

if(int.TryParse(Console.ReadLine(), out int cell)
{

Console.WriteLine($"Wow! your cell is {cell} and value in your cell is{cells[cell]}");
}

public bool CheckCorrectIndex(int tries, int userInput, List<string> listObject, out string value)
{
    if (userInput >= 0 && userInput <= 3)
    {
        value = listObject[userInput - 1];
        return true;
    }
    else
    {
        tries--;
        InputInvalid(tries);
    }
    value = null;
    return false;
}

public bool CheckCorrectIndex(int tries, int userInput, List<string> listObject, out string value)
{
    if (userInput >= 0 && userInput <= 3)
    {
        value = listObject[userInput - 1];
        return true;
    }
    else
    {
        tries--;
        InputInvalid(tries);
    }
    value = null;
    return false;
}

public bool CheckCorrectIndex(int tries, int userInput, List<string> listObject, out string value)
{
    if (userInput >= 0 && userInput <= 3)
    {
        value = listObject[userInput - 1];
        return true;
    }
    else
    {
        tries--;
        InputInvalid(tries);
    }
    return false;
}

public bool CheckCorrectIndex(int tries, int userInput, List<string> listObject, out string value)
{
    if (userInput >= 0 && userInput <= 3)
    {
        value = listObject[userInput - 1];
        return true;
    }
    else
    {
        tries--;
        InputInvalid(tries);
    }
    return false;
}

int tries;

    public void SelectionScreen()
    {
        if (int.TryParse(userInput, out var input))
        {

        }
        else
        {
            tries--;
            InputInvalid();
        }
    }

    public void InputInvalid()
    {
        if (tries > 0)
        {
            Console.WriteLine($"\nInput Must Be An Integer. Try Again. {tries} Left.");
            SelectionScreen(tries);
        }
        else
        {
            Console.WriteLine("\nInvalid Input 3 Times. Returning To Welcome Screen.");
            Thread.Sleep(2000);
            Console.Clear();

            Program program = new();
            program.WelcomeScreen();
        }
    }

int tries;

    public void SelectionScreen()
    {
        if (int.TryParse(userInput, out var input))
        {

        }
        else
        {
            tries--;
            InputInvalid();
        }
    }

    public void InputInvalid()
    {
        if (tries > 0)
        {
            Console.WriteLine($"\nInput Must Be An Integer. Try Again. {tries} Left.");
            SelectionScreen(tries);
        }
        else
        {
            Console.WriteLine("\nInvalid Input 3 Times. Returning To Welcome Screen.");
            Thread.Sleep(2000);
            Console.Clear();

            Program program = new();
            program.WelcomeScreen();
        }
    }

bool valueIsInt = CheckInputIsInteger(tries, Console.ReadLine(), out userSelection);

bool valueIsInt = CheckInputIsInteger(tries, Console.ReadLine(), out userSelection);

        if (CheckInputIsInteger(userInput, out var value))
        {
            //do stuff with value
        }
        else
        {
            //not int
        }

        if (CheckInputIsInteger(userInput, out var value))
        {
            //do stuff with value
        }
        else
        {
            //not int
        }