🧱 API-NTierArch

A clean, modular, and maintainable .NET Web API project built with a custom N-Tier Architecture approach. This repository showcases how to structure scalable backend applications by splitting responsibilities into distinct layers such as API, Business, Core, DAL, and Shared.

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🧠 Architecture Overview

The goal of this architecture is to keep each layer focused on a single responsibility:

src/
│
├── App.API → Presentation Layer (Controllers, Middleware, Swagger)
├── App.Business → Business Logic Layer (Services, Interfaces, DTOs)
├── App.Core → Domain Layer (Entities, Enums, Contracts)
├── App.DAL → Data Access Layer (EF Core, DbContext, Repositories)
├── App.Shared → Shared Layer (External services (Email, Cloud, etc.))
└── App.sln → Solution File

This structure ensures:

• 🧩 Separation of concerns
• 🧪 Improved testability
• 📦 Scalable and maintainable codebase

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🚀 Getting Started

✅ Prerequisites

• .NET 7 or 8 SDK
• SQL Server (or any EF Core-supported database)
• Visual Studio 2022+ or Visual Studio Code

⚙️ Setup Steps

1. Clone the Repository

   git clone https://github.com/ilkoninn/API-NTierArch.git
   cd API-NTierArch/src