Custom DocumentFilter not being applied

[TaylorCaldwell-FiveTalent]

VERSION:

6.2.3

STEPS TO REPRODUCE:

1. Create a custom IDocumentFilter
2. Specify the new Custom DocumentFilter in the SwaggerConfig (e.g. c.DocumentFilter<CustomSwaggerFilter>();)

EXPECTED RESULT:

Filters to be applied based on the routes specified within IDocumentFilter's Apply method.

ACTUAL RESULT:

Filtering is not being applied. Apply method never appears to be hit when setting a breakpoint and debugging locally.

ADDITIONAL DETAILS

The below code shows the current implementation in our project. Is there any reason the following would not work? When setting a breakpoint in the Apply( ) method, it never gets hit during the startup of the application. Any help would be greatly appreciated, thanks.

Custom filter class:

namespace SwaggerFilter.Filters
{
    public class CustomSwaggerFilter : IDocumentFilter
    {
        public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
        {
            var mvcRoutesToRemove = swaggerDoc.Paths 
                .Where(x => x.Key.ToLower().Contains("foo.bar"))
                .ToList();
            mvcRoutesToRemove.ForEach(x => { swaggerDoc.Paths.Remove(x.Key); });
        }
    }
}

Swagger setup:

.AddSwaggerGen(c =>
{
    c.DocumentFilter<CustomSwaggerFilter>();
    c.EnableAnnotations();
    c.CustomOperationIds(e =>
    ...
})

[hlouzek]

add this line
app.UseSwagger(new Swashbuckle.AspNetCore.Swagger.SwaggerOptions());