Auto implemented properties

Context: Auto‑implemented properties simplify syntax by letting the compiler generate a hidden backing field.

Syntax

public string Name { get; set; }
public int Age { get; set; } = 18;  // with default

Read‑Only Auto Property

public string Id { get; }  // can be set only in constructor

Init‑Only Auto Property

public DateTime CreatedAt { get; init; }

Example

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
}

// Usage
var product = new Product { Id = 1, Name = "Laptop", Price = 999.99M };

The compiler generates a private field like _<PropertyName>k__BackingField.