The provided code defines a basic in-memory CRUD (Create, Read,...

September 5, 2025 at 02:30 PM

using System;
using System.Collections.Generic;

public class Item
{
    public int Id { get; set; }
    public required string Name { get; set; }
}

public class ItemRepository
{
    private List<Item> items = new List<Item>();

    // CREATE
    public void Create(Item item)
    {
        items.Add(item);
    }

    // READ (by ID)
    public Item? Read(int id)
    {
        return items.Find(i => i.Id == id);
    }

    // READ (all)
    public List<Item> ReadAll()
    {
        return items;
    }

    // UPDATE
    public void Update(int id, Item updatedItem)
    {
        var item = items.Find(i => i.Id == id);
        if (item != null)
        {
            item.Name = updatedItem.Name;
        }
    }

    // DELETE
    public void Delete(int id)
    {
        var item = items.Find(i => i.Id == id);
        if (item != null)
        {
            items.Remove(item);
        }
    }
}

The provided code defines a basic in-memory CRUD (Create, Read, Update, Delete) repository system for managing a collection of Item objects in C#. Here's what each part of the code does:

Key Components:

Item Class:
- This class represents an entity with two properties:
  - Id (an integer) which is the unique identifier for the item.
  - Name (a required string) which represents the name of the item.
- The required modifier indicates that the Name property must be set when creating or initializing an instance of Item.
ItemRepository Class:
- This class serves as a repository for managing a collection of Item objects (items list).
- It uses a List<Item> as an in-memory storage for the Item objects, allowing CRUD operations.

Methods in `ItemRepository`:

Create(Item item):
- Adds a new Item object to the items list.
Read(int id):
- Finds and returns an Item from the items list based on its Id.
- Returns null if no matching Item is found.
ReadAll():
- Returns the entire list of Item objects (items).
Update(int id, Item updatedItem):
- Finds an existing Item in the list by its Id.
- If found, updates the Name property of the Item with the Name from the updatedItem provided.
Delete(int id):
- Finds an existing Item in the list by its Id.
- If found, removes the Item from the items list.

In summary, this code provides a basic implementation of a repository pattern that manages a collection of Item objects. It demonstrates how to perform Create, Read (single and all), Update, and Delete operations on an in-memory list of items.

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The provided code defines a basic in-memory CRUD (Create, Read,...

Key Components:

Methods in ItemRepository:

Methods in `ItemRepository`: