Real-World Projects in C# - Textnotes

Real-World Projects in C#

Building real-world projects helps apply theoretical knowledge, gain hands-on experience, and prepare for interviews.

1. Student Management System

Description: Manage student records, including add, update, delete, and view operations.

Tech Stack: WinForms/WPF, SQL Server, ADO.NET or EF Core

Key Features:

  1. CRUD operations on students
  2. Search students by name/ID
  3. Export data to CSV or Excel
  4. Login for admin

Example:


// Add student using EF Core
var student = new Student { Name = "John", Age = 20 };
context.Students.Add(student);
context.SaveChanges();

2. Inventory System

Description: Track products, stock levels, and sales.

Tech Stack: ASP.NET Core MVC, EF Core, SQL Server

Key Features:

  1. Product management (CRUD)
  2. Stock in/out transactions
  3. Low-stock alerts
  4. Reporting dashboard

Example:


var products = context.Products.Where(p => p.Stock < 10).ToList();

3. Billing System

Description: Generate invoices and bills for customers with product selection.

Tech Stack: WinForms/WPF, EF Core, SQL Server

Key Features:

  1. Add customer and product details
  2. Generate invoice PDF (DinkToPdf or iTextSharp)
  3. Maintain billing history
  4. Search by invoice number or date

Example:


Invoice invoice = new Invoice { CustomerName = "Alice", Total = 2500 };
context.Invoices.Add(invoice);
context.SaveChanges();

4. Employee Management System

Description: Manage employee records, attendance, and payroll.

Tech Stack: ASP.NET Core MVC or Blazor, EF Core, SQL Server

Key Features:

  1. CRUD for employee details
  2. Attendance tracking
  3. Salary calculation and reports
  4. Role-based access

Example:


var employee = context.Employees.FirstOrDefault(e => e.Id == 1);
employee.Salary += 500; // Increment salary
context.SaveChanges();

5. REST API with JWT Authentication

Description: Secure API for user management or any service.

Tech Stack: ASP.NET Core Web API, EF Core, JWT

Key Features:

  1. User registration & login
  2. Token-based authentication
  3. CRUD endpoints for resources
  4. Role-based authorization

Example:


[Authorize]
[HttpGet("students")]
public async Task<IActionResult> GetStudents()
{
var students = await _context.Students.ToListAsync();
return Ok(students);
}

6. WPF Dashboard

Description: Desktop dashboard for visualizing data using charts and tables.

Tech Stack: WPF, MVVM, LiveCharts or OxyPlot

Key Features:

  1. Data binding with MVVM
  2. Interactive charts & graphs
  3. Real-time updates from database
  4. Customizable widgets

Example:


<lvc:CartesianChart Series="{Binding SalesSeries}" />

7. SignalR Chat Application

Description: Real-time chat application using SignalR.

Tech Stack: ASP.NET Core MVC/Blazor, SignalR, EF Core

Key Features:

  1. User authentication
  2. Real-time messaging
  3. Group chats and private messages
  4. Message history saved in database

Example:


public class ChatHub : Hub
{
public async Task SendMessage(string user, string message)
{
await Clients.All.SendAsync("ReceiveMessage", user, message);
}
}

Summary of Chapter 19:

  1. Real-world projects consolidate C# knowledge across web, desktop, mobile, and APIs.
  2. Projects cover CRUD, authentication, database integration, reporting, and real-time communication.
  3. These projects are ideal for portfolio building and interview preparation.