Immediate execution methods in C Sharp (C#) - Mini Project: Build & Apply

Immediate Execution Methods in C#

📖 Scenario: You are working on a small program that manages a list of book titles in a library. You want to understand how to use immediate execution methods to get results right away from your list.

🎯 Goal: Build a simple C# program that creates a list of book titles, sets a filter condition, uses an immediate execution method to get filtered results, and then prints those results.

📋 What You'll Learn

Create a list of strings called books with exact titles

Create an integer variable minLength to set the minimum title length

Use the Where method with ToList() to filter books with titles longer than minLength

Print each filtered book title using a foreach loop

💡 Why This Matters

🌍 Real World

Filtering lists immediately is useful in apps where you want quick results, like showing books longer than a certain title length in a library app.

💼 Career

Understanding immediate execution methods is important for C# developers working with data collections and LINQ queries to write efficient and clear code.

1

Create the list of book titles

Create a list of strings called books with these exact titles: "C# Basics", "LINQ in Action", "ASP.NET Core", "Entity Framework", "Blazor Guide".

C Sharp (C#)

// Create the list of book titles
// Your code here

Need a hint?

Use new List { ... } to create the list with the exact titles.

2

Set the minimum title length

Create an integer variable called minLength and set it to 10.

C Sharp (C#)

using System.Collections.Generic;

List books = new List { "C# Basics", "LINQ in Action", "ASP.NET Core", "Entity Framework", "Blazor Guide" };

// Create the integer variable minLength and set it to 10
// Your code here

Need a hint?

Use int minLength = 10; to create the variable.

3

Filter books with immediate execution

Use the Where method with ToList() to create a new list called longBooks that contains only books with titles longer than minLength. Use book as the lambda variable.

C Sharp (C#)

using System.Collections.Generic;
using System.Linq;

List books = new List { "C# Basics", "LINQ in Action", "ASP.NET Core", "Entity Framework", "Blazor Guide" };

int minLength = 10;

// Create longBooks using Where and ToList to filter books with length > minLength
// Your code here

Need a hint?

Use books.Where(book => book.Length > minLength).ToList() to get the filtered list immediately.

4

Print the filtered book titles

Use a foreach loop with variable book to print each title in longBooks using Console.WriteLine(book);.

C Sharp (C#)

using System;
using System.Collections.Generic;
using System.Linq;

List books = new List { "C# Basics", "LINQ in Action", "ASP.NET Core", "Entity Framework", "Blazor Guide" };

int minLength = 10;

List longBooks = books.Where(book => book.Length > minLength).ToList();

// Use foreach to print each book in longBooks
// Your code here

Need a hint?

Use foreach (string book in longBooks) { Console.WriteLine(book); } to print each title.