UseWebApi方法是WebApiAppBuilderExtensions类定义的扩展方法,在System.Web.Http.Owin.dll 类库中定义。
打开VS解决方案:在解决方案上点右键->管理NuGet程序包,添加Microsoft.AspNet.WebApi.Owin程序包。
C# Code: [EditorBrowsable(EditorBrowsableState.Never)] public static class WebApiAppBuilderExtensions { public static IAppBuilder UseWebApi(this IAppBuilder builder, HttpConfiguration configuration); public static IAppBuilder UseWebApi(this IAppBuilder builder, HttpServer httpServer); }