在ASP.NET Core Web API 项目里无法访问（wwwroot）下的文件

- 方法代码是： 
- public void Configure(IApplicationBuilder app,IHostingEnvironment env,ILoggerFactory loggerFactory) 
- { 
- loggerFactory.AddConsole(Configuration.GetSetion(“logging”)); 
- loggerFactory.AddDebug(); 
- app.UseDeveloperExceptionPage(); 
- app.UseMvc(); 
- app.UseStaticFiles(); 
- }