swaggerRequestExample属性在ASP.NET MVC 5(.NET Framework 4.5.2)中不起作用

我在玩弄 Swashbuckle.Examples package (3.10.0)在ASP.NET MVC项目中。但是,我不能让请求示例出现在UI中。

配置 (swaggerconfig.cs)

public static void Register()
{
    var thisAssembly = typeof(SwaggerConfig).Assembly;

    GlobalConfiguration.Configuration
        .EnableSwagger(c => {
             c.SingleApiVersion("v1", "TestApp.Web");
             c.IncludeXmlComments(string.Format(@"{0}\bin\TestApp.Web.xml", System.AppDomain.CurrentDomain.BaseDirectory));
             c.OperationFilter<ExamplesOperationFilter>();
             c.OperationFilter<DescriptionOperationFilter>();
             c.OperationFilter<AppendAuthorizeToSummaryOperationFilter>();
                })
            .EnableSwaggerUi(c => { });
 }  

请求示例类

public class EchoRequestExample : IExamplesProvider
{
    public object GetExamples()
    {
        return new EchoInput { Value = 7 } ;
    }
}

public class EchoInput
{
    public int Value { get; set; }
}

行动

[HttpGet]
[Route("Echo")]
[CustomApiAuthorize]
[SwaggerRequestExample(typeof(EchoInput), typeof(EchoRequestExample))]
[ResponseType(typeof(EchoServiceModel))]
public HttpResponseMessage Echo([FromUri] EchoInput model)
{
    var ret = new EchoServiceModel
    {
        Username = RequestContext.Principal.Identity.Name,
        Value = value
    };
    return Request.CreateResponse(HttpStatusCode.OK, ret);
}

SwaggerUI显示XML注释和输出元数据(模型和包含默认值的示例),但不显示请求示例。我依附于流程和 EchoRequestExample.GetExamples 没有被击中。

问题: 如何使swaggerRequestExample属性在ASP.NET MVC 5中工作?

注: Windows标识用于授权。