C# Classes and Objects

Classes are the foundation of object-oriented programming in C#.

Creating a Class

public class Person
{
    // Properties
    public string Name { get; set; }
    public int Age { get; set; }
    
    // Constructor
    public Person(string name, int age)
    {
        Name = name;
        Age = age;
    }
    
    // Method
    public void Introduce()
    {
        Console.WriteLine($"Hi, I'm {Name} and I'm {Age} years old.");
    }
}

Using Classes

// Create an object
Person person1 = new Person("Alice", 25);

// Access properties
Console.WriteLine(person1.Name); // Outputs: Alice

// Call methods
person1.Introduce(); // Outputs: Hi, I'm Alice and I'm 25 years old.

Inheritance

public class Student : Person
{
    public string StudentId { get; set; }
    
    public Student(string name, int age, string studentId) 
        : base(name, age)
    {
        StudentId = studentId;
    }
}

Best Practices

1. Use proper encapsulation
2. Follow naming conventions
3. Keep classes focused
4. Document your code
5. Consider inheritance carefully