What is the equivalent of IHttpControllerSelector for .NET 6?

In .NET 6, the equivalent of IHttpControllerSelector has been replaced by the IHttpApplication<RouteContext> interface, which is part of the new Minimal APIs feature. The IHttpApplication<RouteContext> interface allows you to handle HTTP requests and route them to appropriate endpoints in a more streamlined and simplified manner.

Here's an example of how you can achieve similar functionality using the IHttpApplication<RouteContext> in .NET 6:

csharpCopy code
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;

var builder = WebApplication.CreateBuilder(args);

// Define the route handler
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddRouting();

builder.MapGet("/", async (HttpContext context) =>
{
    await context.Response.WriteAsync("Hello, World!");
});

var app = builder.Build();

app.Run();

In this example, we create a new .NET 6 Minimal API using the WebApplication class. We use the MapGet method to define a route for the root path ("/"). When a GET request is made to the root path, the specified lambda function will be executed, and the response "Hello, World!" will be sent back to the client.

The IHttpApplication<RouteContext> interface is part of the new Minimal APIs feature in .NET 6, which provides a more lightweight and focused approach to building web applications with fewer abstractions and conventions.

Please note that the use of Minimal APIs is not exclusive, and you can still use traditional approaches with controllers and actions if needed. However, Minimal APIs offer a more concise and expressive way to define endpoints and handle HTTP requests in .NET 6.