Swashbuckle adding 200 OK response automatically to generated Swagger file

Question

I am building swagger docs using Swashbuckle in my WebApi 2 project.

I have the following definition of the method:

[HttpPost]
[ResponseType(typeof(Reservation))]
[Route("reservations")]
[SwaggerResponse(HttpStatusCode.Created, Type = typeof(Reservation))]
[SwaggerResponse(HttpStatusCode.BadRequest) ]
[SwaggerResponse(HttpStatusCode.Conflict)]
[SwaggerResponse(HttpStatusCode.NotFound)]
[SwaggerResponse(HttpStatusCode.InternalServerError)]        
public async Task<HttpResponseMessage> ReserveTickets([FromBody] ReserveTicketsRequest reserveTicketRequest)
{
    // ...
    return Request.CreateResponse(HttpStatusCode.Created, response);
}

However the generated Swagger file contains HTTP 200 OK as well, although it's not specified anywhere.

/reservations: 
  post: 
    tags: 
      - "Booking"
    operationId: "Booking_ReserveTickets"
    consumes: 
      - "application/json"
      - "text/json"
    produces: 
      - "application/json"
      - "text/json"
    parameters: 
      - 
        name: "reserveTicketRequest"
        in: "body"
        required: true
        schema: 
          $ref: "#/definitions/ReserveTicketsRequest"
    responses: 
      200: 
        description: "OK"
        schema: 
          $ref: "#/definitions/Reservation"
      201: 
        description: "Created"
        schema: 
          $ref: "#/definitions/Reservation"
      400: 
        description: "BadRequest"
      404: 
        description: "NotFound"
      409: 
        description: "Conflict"
      500: 
        description: "InternalServerError"
    deprecated: false

Is there a way to get rid of that 200 OK? It's confusing as it's not a valid response.

Thanks for suggestions.

Answer 1

        services.AddSwaggerGen(c =>
        {
            c.OperationFilter<Api.Swagger.RemoveDefaultResponse>();
        });

   public class RemoveDefaultResponse : IOperationFilter
   {

    public void Apply(OpenApiOperation operation, OperationFilterContext context)
    {
        if (operation.Responses.TryGetValue("200", out var response)) {
            if (response.Description == "Success") {
                operation.Responses.Remove("200");
            }
        }
    }

   }