To-Do List Manager Console App

A multi-user console-based To-Do List Manager written in C#.

It allows users to manage their tasks with categories and priorities, and persist them across sessions using a text file.

Features

Multi-user registration and login (Authentication)

CRUD Operations Add, edit, and delete tasks

Mark tasks as complete/incomplete

Filter tasks by priority or category

Organize tasks into categories

Save and load tasks from a .txt file

Save and load tasks from a JSON file

Built with Object-Oriented Programming (OOP) and SOLID principles

Clean code structure and maintainable design