我发现不足50KB的很小的图片可以正常上传，一旦稍微大一点的图片上传就报错， 紧接着F5调试中断退出，iis弹出提示关闭，然后浏览器报了一个404的错误，

Failed to load resource: the server responded with a status of 404 (Not Found) 
 


public class UEditorController : Controller
    {
        private readonly UEditorService _ueditorService;
        public UEditorController(UEditorService ueditorService)
        {
            this._ueditorService = ueditorService;
        }

        [HttpGet, HttpPost]
        public ContentResult Upload()
        {
            try
            {
                var response = _ueditorService.UploadAndGetResponse(HttpContext);
                return Content(response.Result, response.ContentType);
            }
            catch (Exception ex)
            {

                string mes= ex.Message;
                return null;
            }
        }

    }