How to correctly pause/delay Windows Forms application

Question

I am a beginner to the OOP and the C#.

I am working on a quiz game using the Windows Forms. My problem is related to two classes, the form and the game logic. I have a basic UI with classic Froms controls. Take a look.

The thing I want to achieve is, when a player presses any answer button, it will higlight that pressed button by red or green color, depending on if it is right or wrong answer. After changing the color I want the program to wait for a while and then go to the next question.

Probelm is, that I don´t know how to achieve this correctly. I don´t know how to work with threads and how exactly the Form app works related to threads. Should I use a thread sleep or a timer or a async?

I will show you the method in game logic class which should handle this.

public static void Play(char answer) //Method gets a char representing a palyer answer
    {
        if (_rightAnswer == answer) //If the answer is true, the button should become green
        {
            Program.MainWindow.ChangeBtnColor(answer, System.Drawing.Color.LightGreen);
            _score++;
        }
        else //Otherwise the button becomes Red
        {
            Program.MainWindow.ChangeBtnColor(answer, System.Drawing.Color.Red);
        }

        //SLEEP HERE

        if (!(_currentIndex < _maxIndex)) //If it is the last question, show game over
        {
            Program.MainWindow.DisplayGameOver(_score);
        }
        else //If it is not the last question, load next question and dispaly it and finally change the button color to default
        {
            _currentIndex++;
            _currentQuestion = Database.ListOfQuestions.ElementAt(_currentIndex);
            _rightAnswer = _currentQuestion.RightAnswer;
            Program.MainWindow.DisplayStats(_score, _currentIndex + 1, _maxIndex + 1);
            Program.MainWindow.DisplayQuestion(_currentQuestion.Text);
            Program.MainWindow.DisplayChoices(_currentQuestion.Choices);
        }
        Program.MainWindow.ChangeBtnColor(answer, System.Drawing.SystemColors.ControlLight);
    }

I don´t want to completely block the UI but also I don´t want users to make other events by pressing other buttons during the pause. Because it will result in improper run of app.

Answer 1

If the program is really simple and you do not want to implement Threads I would suggest using Timer. Just start your Timer when clicking answer button. Your timer should contain function which would stop itself after some time and do other actions needed (e.g. pick another question).