You want to create an immutable record-like class with properties set only once during creation. Which approach best uses init-only setters to achieve this?

hard🚀 Application Q8 of 15

C Sharp (C#) - Properties and Encapsulation

public class Product {
    public string Name { get; init; }
    public decimal Price { get; init; }
}

How should you create and set properties for a Product instance?

Avar p = new Product { Name = "Pen", Price = 1.5m };

Bvar p = new Product(); p.Name = "Pen"; p.Price = 1.5m;

Cvar p = new Product(); p.Name = "Pen"; p.Price = 1.5m; p.Price = 2.0m;

Dvar p = new Product(); p.Name = "Pen";

Step-by-Step Solution

Solution:

Step 1: Understand init-only setter usage
Properties with init-only setters must be set during object initialization.
Step 2: Evaluate each creation method
var p = new Product { Name = "Pen", Price = 1.5m }; uses object initializer syntax correctly; B and C assign after creation (invalid); D misses Price assignment.
Final Answer:
var p = new Product { Name = "Pen", Price = 1.5m }; -> Option A
Quick Check:
Init-only properties set in initializer = var p = new Product { Name = "Pen", Price = 1.5m }; [OK]

Quick Trick: Use object initializer to set init-only properties [OK]

Common Mistakes:

MISTAKES

Assigning init-only properties after creation
Trying to reassign init-only properties
Omitting required property assignments

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You want to create an immutable record-like class with properties set only once during creation. Which approach best uses init-only setters to achieve this?

Step 1: Understand init-only setter usage

Step 2: Evaluate each creation method

Final Answer:

Quick Check:

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