C# Cheat Sheet

• Variables
• Data types
• Operators
• Conditional statements
• Curls
• Functions/Procedures
• Tables/Lists
• Objects
• Classes
• Paradigms
• Heritage
• Scope
• Exceptions
• Libraries/APIs
• **Input/Output (input/output) **

---

Fundamentals with the C# language

Variables

int age = 25;
string name = "John";

Data types

int num = 10;
double pi = 3.14;
bool isActive = true;
char letter = 'A';

Operators

int sum = 5 + 10;
int difference = 20 - 5;

Conditional Statements

if (age > 18)
{
    Console.WriteLine("Majeur ");
}
else
{
    Console.WriteLine("Mineur");
}

Loops

for (int i = 0; i < 5; i++)
{
    Console.WriteLine(i);
}

Functions

void SayHello()
{
    Console.WriteLine("Hello!");
}

**Paintings **

int[] numbers = {1, 2, 3, 4, 5};

Objects and Classes

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

Person person = new Person() { Name = "John", Age = 25 };

**Legacy **

public class Employee Person
{
    public string JobTitle { get; set; }
}

**Scope **

public int globalVar = 10;

public void SomeMethod()
{
    int localVar = 5;
}

Exceptions

try
{
    int result = 10 / 0;
}
catch (DivideByZeroException e)
{
    Console.WriteLine("impossible de diviser par zero!");
}

Entry/Exit

string userInput = Console.ReadLine();
Console.WriteLine("Vous avez écrit" + userInput);

Example code to create a c# quiz for unity

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class QuizCode : MonoBehaviour
{
    public List<QuestionAndAnswers> QnA;
    public GameObject[] options;
    public int currentQuestion;
    public Text QuestionTxt;

    private void Start()
    {
        generateQuestion();
    }

    public void correct()
    {
        QnA.RemoveAt(currentQuestion);
        generateQuestion();
    }

    void setAnswers()
    {
        for(int i = 0; i < options.Length; i++)
        {
            options[i].GetComponent<AnswerScript>().isCorrect = false;
            options[i].transform.GetChild(0).GetComponent<Text>().text = QnA[currentQuestion].Answers[i];

        if (QnA[currentQuestion].CorrectAnswer == i + 1)
            {
                options[i].GetComponent<AnswerScript>().isCorrect = true;
            }

        }
    }

    void generateQuestion()
    {
        currentQuestion = Random.Range(0, QnA.Count);

        QuestionTxt.text = QnA[currentQuestion].Question;
        setAnswers();

    }
}