ASP.NET Core - Automatically apply the [ApiExplorer] attribute

Last week I talked about the [ApiExplorer] attribute and how it can simplify your controller code when implementing Web API's.

Today I have a small tip for you, did you know it isn't necessary to annotate every controller with the [ApiExplorer] attribute?

It is also possible to apply the attribute to an assembly. When the [ApiController] attribute is applied to an assembly, all controllers in the assembly have the [ApiController] attribute applied.

Therefore apply the assembly-level attribute to the Program.cs file:

	using Microsoft.AspNetCore.Mvc;
	//Applies the ApiController attribute to all your controllers
	[assembly: ApiController]
	var builder = WebApplication.CreateBuilder(args);
	builder.Services.AddControllers();
	var app = builder.Build();
	app.UseHttpsRedirection();
	app.UseAuthorization();
	app.MapControllers();
	app.Run();

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