我已經創建了一個 .NET Core API 控制器，并且在 POST 方法中，我嘗試使用CreatedAtActionResult方法將路由作為 Location Header 包含在我的響應中。[ApiController, Route("v1/[controller]")]public class WidgetController: ControllerBase{    public WidgetController(IWidgetService service)    {        _service = service;    }    private readonly IWidgetService _service;    [HttpGet("{id}", Name = "GetSingle")]    public IActionResult GetSingle(Guid id)    {        var result = _service.Get(id);        return Ok(result);    }    [HttpPost]    public IActionResult Post(WidgetModel model)    {        var result = _service.Post(model);        return result == Guid.Empty                    ? (IActionResult) BadRequest("No changes saved.")                    : CreatedAtAction(nameof(GetSingle),                                      new {id = result},                                      model);    }}當我啟動應用程序時，POSTman 對 POST 的第一次調用運行沒有問題。對象和 Location Header URL 都按預期生成。但是，如果我在代碼仍在運行時再次嘗試訪問該端點，則會出現以下錯誤：System.InvalidOperationException：1[Microsoft.AspNetCore.Routing.RouteValuesAddress]' has been registered.     at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)     at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)     at Microsoft.AspNetCore.Routing.DefaultLinkGenerator.GetEndpoints[TAddress](TAddress address)     at Microsoft.AspNetCore.Routing.DefaultLinkGenerator.GetPathByAddress[TAddress](HttpContext httpContext, TAddress address, RouteValueDictionary values, RouteValueDictionary ambientValues, Nullable在 Microsoft.AspNetCore.Routing.LinkGeneratorRouteValuesAddressExtensions.GetPathByRouteValues