📋 List Selection Program in C#

This is a simple yet functional C# console application that lets users manage a list of numbers through a text-based menu. It supports adding, displaying, sorting, and analyzing numeric data.

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🔍 Overview

🔁 Control Flow Structures Used

• while loop
• switch statement
• if / else statements
• for loops

🛠️ Methods and Functions Used

• Console.WriteLine() / Console.Write()
• Console.ReadLine()
• Convert.ToInt32(string)
• List from System.Collections.Generic

Supports methods such as:

• Add() – adds a number to the list.
• Clear() – empties the list.
• Count – gets the current number of items.
• Contains() – checks for duplicates.

⚠️ Built-in LINQ methods such as .Sort(), .Min(), .Max(), .Avg(), and .Find() are not used — all logic is implemented manually.

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🎯 Features

• P - Print numbers in the list
• A - Add a number (prevents duplicates)
• M - Calculate mean of the list
• S - Find smallest number
• L - Find largest number
• F - Find a number by value and display its index
• C - Clear the list
• T - Toggle sort order (Ascending / Descending)
• D - Display current sort order
• Q - Quit the application

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🚀 How to Run

Run via .NET CLI:

git clone https://github.com/Mostafa-SAID7/list-selection.git
cd list-selection
dotnet run

You can also run it from Visual Studio or Visual Studio Code by opening the folder and pressing F5 or using the terminal.

💡 Learning Goals

This project helps you:

• ✅ Practice list manipulation in C#
• ✅ Implement manual sorting (bubble sort logic)
• ✅ Handle user input using switch-case statements
• ✅ Think algorithmically about calculating mean, minimum, and maximum without built-ins

🧩 Potential Add-ons

Consider adding the following to enhance the project:

• 🔁 Swap two elements by index
• ↩️ Undo the last action (add or remove)
• 💾 Save/load list from a file
• 🖼️ Create a GUI version using WinForms or WPF
• 📤 Export the list to a .csv or .json file

🛠 Requirements

• .NET 6.0 SDK or later
• An IDE or editor such as:
• Visual Studio
• Visual Studio Code (with the C# extension)
• Or a simple terminal for running with dotnet run

📝 How to Use This README

To integrate this documentation into your GitHub project: In your project root directory, create a file named README.md. Copy and paste all of this text into that file. Save the file.

Commit and push it to your GitHub repository using the following commands:

git add README.md
git commit -m "Add full project documentation"
git push origin main

Once pushed, GitHub will automatically render the README.md on the repository homepage.

👤 Author

Mostafa SAID

📄 License

This project is licensed under the MIT License.