ASP.NET Core WebAPI default route not working

As @tmg mentioned, do the following:

Right click your web project -> Select Properties -> Select the Debug tab on the left -> Then edit the 'Launch Url' field to set your own default launch url.

You can change the default route by modifying LaunchSettings.json file as shown

Follow the steps below.

Create a base controller for your API that extends base controller of dotnet core:

using Microsoft.AspNetCore.Mvc;

namespace WebApi.Controllers
{
    [Route("api/[controller]")]
    public abstract class ControllerApiBase : Controller
    {

    }
}

And inherit the base class in your API controllers:

using Microsoft.AspNetCore.Mvc;
using WebApi.Dtos;

namespace WebApi.Controllers
{
    public class PingController : ControllerApiBase
    {
        public PingDto Get()
        {
            return new PingDto
            {
                Version = "0.0.0"
            };
        }
    }
}