ASP.NET Core

Short Introduction

ASP.NET Core is a cross-platform, high-performance framework for building modern, cloud-based, Internet-connected applications.

Official Definition

ASP.NET Core is a free, open-source, and cross-platform framework for building modern cloud-based web applications on Windows, macOS, and Linux.

Usage

// Program.cs - ASP.NET Core 8
var builder = WebApplication.CreateBuilder(args);

// Add services to the container
builder.Services.AddControllersWithViews();
builder.Services.AddRazorPages();

var app = builder.Build();

// Configure the HTTP request pipeline
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.MapRazorPages();
app.Run();

Use Cases

• Web applications
• RESTful APIs
• Real-time applications
• Microservices
• Backend services

When to Use / When Not to Use

Use ASP.NET Core when:

• Building web applications or APIs
• Need high performance
• Require cross-platform deployment
• Want modern development patterns

Consider alternatives when:

• Simple static websites
• Specific language requirements
• Team expertise in other frameworks

Market Alternatives

• Spring Boot (Java)
• Express.js (Node.js)
• Django/Flask (Python)
• Ruby on Rails
• Laravel (PHP)

Sample Usage

// Controller example
[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    private readonly IProductService _productService;

    public ProductsController(IProductService productService)
    {
        _productService = productService;
    }

    [HttpGet]
    public async Task<ActionResult<IEnumerable<Product>>> GetProducts()
    {
        var products = await _productService.GetAllProductsAsync();
        return Ok(products);
    }

    [HttpPost]
    public async Task<ActionResult<Product>> CreateProduct(CreateProductDto dto)
    {
        var product = await _productService.CreateProductAsync(dto);
        return CreatedAtAction(nameof(GetProduct), new { id = product.Id }, product);
    }
}