Aspnet Api Versioning

    private static void ConfigureApiVersioning(HttpConfiguration config)
    {
        // Enable API versioning. Each API will require (unless opted out) ?api-version={version}
        config.AddApiVersioning(options =>
        {
            // register cancel controller api version
            var cancelSubscriptionApiVersion = new ApiVersion(DateTime.Parse(asyncVersionString, CultureInfo.InvariantCulture));
            MarketplaceCommerceApiLogger.Instance.LogInformation("Configuring cancel orders api version as " + cancelSubscriptionApiVersion);
            options.Conventions.Controller<CancelSubscriptionController>().HasApiVersion(cancelSubscriptionApiVersion);

            // API opted out.
            options.Conventions.Controller<DiagnosticController>().IsApiVersionNeutral();
        });
    }

    public static void Register(HttpConfiguration config)
    {
        ConfigureIocContainer(config);
        ConfigureCors(config);
        ConfigureApiVersioning(config);

        // Web API routes
        config.MapHttpAttributeRoutes();

        // Setup global exception handler and loggers
        // https://docs.microsoft.com/en-us/aspnet/web-api/overview/error-handling/web-api-global-error-handling
        config.Services.Replace(typeof(IExceptionLogger), new ApiExceptionLogger());
        config.Services.Replace(typeof(IExceptionHandler), new ApiGlobalExceptionHandler());

        // Configure Serialization
        config.Formatters.JsonFormatter.UseDataContractJsonSerializer = false;
    }

    Startup.cs



    public void Configuration(IAppBuilder app)
    {
        try
        {
            HttpConfiguration config = new HttpConfiguration();

            app.Use<IncomingRequestTraceMiddleware>();

            WebApiConfig.Register(config);
            app.UseWebApi(config);
        }
        catch (Exception ex)
        {
            ....
        }
    }